Dr Who is a terrible example for you, it's one show that has so clearly tried to embody a kind of identity politics ideology, and it's ruined the show.
Had sex-changing Time Lords been a part of the lore since the early days, or even arisen naturally, that would have been fine. No real sci-fi fan is unacquainted with sex changing aliens, from The Left Hand of Darkness to Star Trek. And there are plenty of stories of such things in literature and mythology, it's an idea that has a lot of scope for interest.
In the case of Dr Who, there had no sense before gender ideology arose that Time Lords changed sex. Probably not for any good reason, really. It became a thing because tv producers thought it sent the kind of message in terms of social and political perspectives, and because film and tv now have a huge hard on for sex swapping roles.
At the same time you see them filling roles of secondary characters as if by some tick box, and turning more and more to stories that focus on social justice themes and scenarios, with all the subtly of a Victorian morality play about the evils of gin.
Audience know when they are being patronized, which is why Dr Who has such terrible audience numbers now.