People still argue about the pros vs. college stuff? Most of the upper echelon players in college basketball either never make it to the NBA, or they can't survive very long once they do. And those are the best players in college (there aren't many). Most college teams have rosters full of guys that don't play much ball after they graduate.
The worst NBA team still has at least 10 professional players on it (let's say the 11th and 12th man shouldn't be there), that still leaves two times the amount of pro players that even the best college team will have. The NBA team wouldn't even have to try very hard to win rather easily.
I remember when people were saying Alabama could give Jacksonville a run for their money. The thing is, they'd have to call the game off early, otherwise, they'd be putting the health of the college players at risk.