re: Why hasn't the under hand freethrow shot ever caught on?

I read a story where...obviously Rick Berry touted it as far more accurate...I forgot the reasons but it's so much softer of a shot so you can miss but if you hit the rim not atrociously - it can bounce in.

But he said...(paraphrasing) that it's an additional skill you have to learn apart from normal shooting and players are:

1) Lazy
2) Think it's going to mess with their shot