I think school is very important and I personally had a great experience at North Carolina, which helped shape me as a basketball player and a person. Every once in a while, you will have a player who can make the jump and have an immediate impact on the professional level, but most of the players who come out would absolutely benefit from going to college.
You pile up enough tomorrows and you'll be left with nothing but a bunch of empty yesterdays. I don't know about you, but I'd like to make today worth remembering.