No surprise--you're not likely to make it into the top 1% without good financial habits. Since good financial habits generally translate into a better socioeconomic situation this is what you would expect--the ones coming from the bottom of the pile don't know how/don't have the willpower to make it to the top.
It isn't a surprise because wealth determines the inheritance of countless factors that all causally determine future earnings.
"Good financial" habits are only a small part of it and they matter much more once you already have some amount of wealthy to make decisions about. The impact is multiply mediated and includes just the actual impact of wealth on creating future wealth. If I inherit 20k and you 100k and we make the same investment with a 500% return, then I now have 100k and you have 500k. We did the exact same thing and you did nothing to "earn" any more than me, and yet I earned only 80k and you earned 400k. Money makes money, thus small advantages become exponentially larger ones over time even without any differences in how those starting finances are used. Other causal pathways include the gift of superior education which has a lifetime of impacts that can never be "made up". Family stressors related to finances and health are other mediators, as are community stressors like crime.
Higher family income directly impacts all of these which impact the developing child in ways that make potential future earnings lower. Parental wealth has direct impacts even after the children leave home. Poorer parents have more health issues, plus living and dying arrangement issues that they have no money to cover and that the child must do and pay for themselves, reducing the time and the saving they have to invest toward future wealth.
Finally, there is inheritance of "social advantages", which include everything from your parents well-off friends doing favors for you (wealthy people including "self made" have stories full of these) as well as just simple inheritance of physical traits that give you advantages from race to being taller or more "attractive" which are all proven to cause financial advantages.
A major reason for the point above is that wealth generates wealth. The more wealth you have the more opportunities to gain more wealth, the greater the amount gained by each opportunity, and the less the amount of effort or skill required to yield those outcomes (e.g., simply writing a check when someone else tells you to in order to acquire a high return asset.
Read
The Millionaire Next Door. While people come from a decent background few of them actually inherited any substantial amount. What they got from their parents is far more good attitudes rather than money.
Read actual science. Everything I describe above is scientifically supported to be related to wealth (some directly caused by it) and all it impacts future wealth as an adult. They inherit not just lump sums in a bank account, but countless other assets that are causally impacted by their parents wealth, some material and even physical traits that confer social advantages, but others in the form of better education, less environmental stress and worries, more people in positions to give favors, etc.. Plus they inherit siblings that are wealthier and all the advantages that brings. Plus, they inherit a safety net that allows them to risk long term payoff without worrying short-term losses that they know their family can cover.
Also, you are missing the main point that small amount of actual liquid $ inherited becomes an exponential advantage over time, even when the person does nothing any wiser or financially prudent.