Something I hated about working in corporate America was surviving multiple leadership regimes, watching the same lessons being learned over and over, having to recount history to new regimes, it got really tiring, and particularly dealing with the attitudes and self regard of some.
I have often thought this - a wave of people learn something and on come the next wave to relearn it all. They can read books but they don't really "get" what the books say and have to learn it all from personal experience all over again. It's not just America.