I voted "no," but I have to qualify my answer.
If you can do the job, I don't think it necessarily matters whether you've gone to college for a year or even graduated HS for that matter. Do you need to be a HS graduate to work in a mine, flip burgers at McDonald's, etc?
That said, the odds of making it as a pro athlete are very, very small. So one would hope these players are being encouraged and helped to have a "Plan B" for life without pro sports or life after 2-3 years when marginal players get cut and replaced by the next crop of rookies and cheaper FA's. I'm very much AGAINST forcing players to attend college. It is not a requisite for all 18-yr olds. Why does it have to apply to great basketball players post-HS? If they're good enough to be drafted, they shouldn't have to attend college. It's clearly just a money grab by universities who benefit from having the best players forced to enroll somewhere for a year.