I read a lot of SF as well—the transgender propaganda insanity was one piece the writers missed and has been a big and nasty surprise.
SF writers also did not predict wackadoodles like the Nazi guy in Europe telling everybody to eat bugs and “own nothing”.
Another surprise has been the rise of the Karenocracy in organizations small and large, private and public—nasty women trying to make everybody miserable.
One more has been the attempt to make the ugly replace beautiful—partially predicted by Vonnegut to be fair.
All that is an argument against time travel...
Ursula Le Guin wrote a book called THE LEFT HAND OF DARKNESS, where people could and did change their sex at will. It’s a disgusting book.Sadly it was required summer reading for kids in a private, elite boarding school and totally inappropriate.