There are also times when you want to just give a bench player a chance to see what he/she can do...it's a lot more likely to happen if the coach knows he can get the player back out and the starter back in if it just isn't working. I think a lot of developing players would spend a lot more time on the bench and less on the field if putting a player out there or pulling a starter off had to be a long-term commitment.
At the high school level, I'm pretty much against limiting by rule a player's opportunities to get into the game.
