While I get that Heinlein may have intended to make genuine predictions...
"Heinlein carefully points out that all good science fiction writers tell a story first and prophesy second, using arguably the greatest of them all, H.G. Wells, as an example."
There's something I really dislike about evaluating science fiction as prediction in general.
A work of fiction can't be right or wrong, just more or less similar. Flying cars and geopolitics in the year 2000 are no more right or wrong than the color of imagined character's eyes.