Are you kidding me? If you let the ball drop there's a huge chance it will bounce backwards 10-20 yards. Or are you saying just fair catch it every time?
If you send 11 guys to block, what happens when the punter throws a pass to the wide open gunners? You at least have to have 2 guys out on their gunners.
Disagree on fielding punts obviously because you can change field position easily with an average return - but there certainly is very little point to fielding it inside the f-ing 10 yd. line if it had any sort of hang time on it.