personally I only like "Starship Troopers" and would say he was one of my most disliked SciFi writers. It just feels like a Hippie fueled throw up to see what sticks on the walls, minus Starship Troopers and why did they make that movie when it didn't have anything that the book had to say in it?
But what bothers me is the snow-clone nature of that statement that Heinlein was not recognized. It's like a knee -jerk default hyperbolic internet article closing, and I don't think it was true. Especially compared to people like Asimov and Clarke. They all had their little heyday as modern day prophets and fell by the wayside in the wider popular consciousness, no more "consistency" in recognition than any other. PKD, on the other hand seems to be bonafide cultural darling.
I really dislike these sorts of remarks. Heinlein is down in the records as one of the "Big Three" authors in the golden age of science fiction. Any Science Fiction reader knows how much of a giant he is. Just because The Atlantic, didn't decide to declare him a singular hidden gem, or HBO didn't make a series based on his works, doesn't mean he wasn't recognized or appreciated in full.
Either that statement is false, in which case the JS community really is that insular and arrogant -- or it's true, which is probably even worse.
Either way, this assertion scares me.