Those movies have even less in common with Robert Heinlein’s book than the movies that were made based on Ian Flemming’s books.
Of course. has there even be a movie close to the actual literature?
The only one I know of that was ALMOST PERFECTLY CLOSE and followed the literature was ROAD TO PERDITION with Tom Hanks. Mendez bought the graphic novel and followed the scenes in the movie EXACTLY (almost) as what it shows in the graphic novel. I have a copy and it’s scarily close..