Like Outlander, Grey's Anatomy,....
Because producers go out of their way to include enough relationship "porn" to get women.
Uh huh, I'll take that a concession that you overreached with your claim.
Man, every television sitcom is relationship porn for guys. Regular looking husband, generally very attractive wife. In fact, this is so common in movies, it can't even be considered a trope as much as it is a backbone to American cinema.
Unfortunately, no amount of relationship "porn" can make women watch SciFi TV series.
Oddly enough, they needed to add a pair of large breasts to get men to watch Star Trek Voyager.
Of course it's not easy to jam a lot of relationship "porn" into SciFi. It just does not work.
Well, to be fair, there is virtually no SciFi on television at all. And the best Sci-Fi has struggled like heck to stay on at all (B5, The Expanse, Firefly
*sobs*).
Bottom line, men don't watch Oprah. And Doctor Phil, really?
And men generally watch professional wrestling, therefore men don't watch shows with plots?