Agreed, but some basic fundamentals shouldn't need to be taught in the minors though either. They're fundamentals. You learn that stuff in little league.
That said, there were times were you have guys that haven't played the outfield before manning the outfield. There are positional fundamentals too and if you've never played that position before (or not very often anyway), it's unreasonable to expect them to be well versed in them.
I don't think the game is taught the same way anymore anyway, so all of this is somewhat moot.