I used to read a lot of science fiction between 12 and 14 (let's just say the stuff was a mind-expanding psychedelic drug). I read some even today, but not much. I do know there is some furor in the science fiction world because it's apparently been taken over by leftists and they've imposed PC on it, which means they're not interested in quality but instead leftist beliefs.
And that brings me to Heinlein.
I was never a fan of his. The first story of his I read was "Waldo," (which is about the occult) which was an early story and which I still think is his best. But when I read Farmham's Freehold I thought he'd lost his mind. It was about incest, castration and cannibalism and some other loony things I've forgotten about.
People have attacked Heinlein as a fascist. Har har! Heinlein was married three times and his last two marriages were open marriages. His second wife was a practicing witch. At first he was a self-proclaimed socialist.
The guy was a hippie before there were hippies! He never ceased being a hippie. All you have to do is read Stranger in a Strange Land, which is so bizarre and so leftist no society could be founded on it. As for The Moon is a Harsh Mistress, it's pretty libertarian.
People think because he wrote Starship Troopers he's some kind of fascist. Really? Being anti-draft is fascist? How so?
People who disparage him know nothing about him. And I suspect if I met him I would not like him, but I'm not going to tell lies the way the ignorant do.
I'll tell you this, though: he'll last a lot longer that the leftist retards of today.