How many players have been hurt by this rule? Any?
All of the ones who could've/should've been making money in the NBA a year earlier.
It's ridiculous that the one-and-done types who NBA experts say are ready after completing high school (or earlier) are going to college because of an arbitrary rule that says NBA players need to be a year out of high school, which is in place for dubious reasons. My impression is that most current one-and-dones consist of kids who would go pro w/o the one if allowed, as opposed to kids who chose to go to college and/or weren't good enough to go pro and then were so good there in one year that the situation changed and they go pro.
In other words, even with no rule, I feel that the "baseball rule" would essentially be in effect if there was no rule. The elites who otherwise would be "one and done" would go pro right away, and the college players would play in college and develop until they've become NBA-worthy, likely in more than one year. If there's an exceptional scenario, there'd be no rules arbitrarily allowing for the surprise freshman stud to go pro rather than be stuck in college for 2 more years for no reason.
And there'll be dumbass kids who overvalue themselves and go pro right away and lose their eligibility, and dumbass NBA teams who take them, but the free market will eventually smarten everyone up.