You are a nice guy and it is a pleasure to chat with you, and about you.
Since you ask though, my own self-assessment for my reasons for the views that I hold---
I have never told anyone all this below, either in person or on the internet, but when I was a boy growing up I realized that I was developing very interests from my mom. She was (and still is) a very kind person, but also very stereotypical and uninteresting and even annoying in terms of personality. Her hobbies are entirely focused on cooking/baking and sewing/quilting, nothing unique or abstract or thought-provoking. When I was young I was incredibly bored by her interests, and was loving science (especially astronomy). She frankly just bored the hell out of me to be around, not someone who I would be friends with, much less want to be married to. Dad was much more interesting. So from an early point I looked at my mom and dad's marriage and realized "If this is what it means to be married, then I do not want to be married." She turned me off to the idea of being married.
Later in life (late teens or early 20's, I forget) when I first started to date, that was still a residual attitude in the back of my mind. Why would I want to promise now to always being in a relationship with a specific individual for all of my life? Just for the sake of being able to carry the title of "married" even though I may get tired of being married to that particular woman? Even before the leap of marriage---why should I commit to being in an exclusive relationship with one woman, when at some later point I may prefer to be in an exclusive relationship with a different woman who I meet? If the latter situation arose, then I would just break off the first relationship and pursue the second. Then what was the point of making the commitment in the first place? It really did not amount to anything, except making it harder (emotionally) to leave even if I wanted to. I was uncomfortable thinking such thoughts and never expressed them to anyone else, because they seemed so against-the-norms, and so there was probably something wrong with me for thinking them. They seemed so obvious to me though. So I was always in a state of mental limbo, quietly, even through the years while I was either in a relationship with a woman or seeking to be in a relationship with a woman.
At one point a particular girlfriend and I split, and I decided to act on my previous hunch and just take a break from dating altogether, and try being single again. Find out who I am individually and what my personality is, rather than feeling as if I had to be one half of a couple and sacrificing my interests to be with her (one evening she wanted to go to some restaurant, and I really wanted to go see some particular movie that was opening, and she won our disagreement. That was a moment of realization that this was not what I wanted to be routinely doing). Being single felt refreshing, and I am still attracted to women but less to the idea of being in a relationship with women where at some point we vow that we will always be together, even if our feelings later change and we do not want to be together. Making such a commitment seems rather vapid, and against what is best for us. If a couple is in a long-term relationship, it would be better if it was NOT because 25 years ago they made the legal promise to forever in the future be together even if they may be unhappy, but that it was always more of a repeating short-term realization that "I want to be with Peter/Nancy right now more than I want to NOT be with him/her." The option to leave though would always be on the table. I would not want a woman to feel trapped in a relationship me, and if I really wanted what is best for her then I would always want to make it easy for her to leave if she wanted out. I would always want to be able to leave easily too, if I desired that.
Thanks. That all makes a lot of sense. Yes, your feelings are somewhat against norms, but not that unusual, especially nowadays, and there is certainly nothing at all wrong with them, though it was natural for you to have thought that. Hopefully you either don't still think it or at least think it much less.
As to your parents marriage, I think it's fair to say that most people's views on relationships are coloured by the ones they inhabited, experienced or witnessed as a child.
It sort of sounds as if you've managed to find the right place and the right approach for you. Which is fab. Yes, you are right, it is not necessarily a good thing to feel as if one needs to be one half of a couple (and I speak as someone who is probably addicted to the idea, lol, and might benefit from a detox).
I would only add that saying that staying in or being in a long relationship, even an imperfect one, even perhaps a bad one, is bad for us compared to being in a situation where we are completely free and unencumbered regarding commitment or promise, is a personal viewpoint. Odd as it may seem, some people may in fact be happier with the former. I guess it's complicated. Most marriages, including mine, have benefits and disadvantages at the same time. That said, I am a bit suspicious of polls that seem to show that married people are, on average, happier. I once read that such polls do not typically include a rather large and growing demographic, of people who are not married, but had been (had gotten divorced). If those people's views on the happiness of being married were included in the data on the 'what it's like to be married' side of the tally, I'm not sure it would give the same results.
Getting back to your other, related point about financial incentives for marriage and/or having children, as I said, I am at the end of the day not in favour of either, on balance (despite having to admit we benefitted from both) though as I said I can understand some of the reasons. And indeed some of the reasons are arguably not even good ones (though equally some are). Some of the ones that are arguably not good are to do with maintaining traditions more or less for the sake of maintaining traditions, and of course most of these traditions come from a time when things were less gender neutral than today and often involved patriarchal attitudes.
Singledom (if that's the right word for being single) has tended to be somewhat frowned upon, especially for women, but for men also. There's no good, rational reason for that at all, imo, especially nowadays when for example women in most developed countries can be financially independent. And as far as I can tell, singledom is now becoming much more acceptable. As is not having children. Which imo is a good thing, because it extends free choices.