Again, some people (particularly the athletes) act like this is just the same as signing a free agent contract in football. "Hey, I'm on a new team, yee-haw."
Kids are in school, they are trying to earn diplomas. The NCAA cares (or pretends to care) about the academic side of things. They are not big fans of the Alabamas and Clemsons of the world trying to force kids to leave after a year or two.
Sure, we can hope that "kids could blow up somewhere else", but the reality is that many transfers do NOT end up any better at School #2. We've seen that for decades.
I'm not making the case that kids should NEVER leave Alabama or Clemson, but only that if you leave the rule very open-ended, you will soon see high-pressure push-outs at the top schools. And I don't think the NCAA will want that, even if we can hope that a transfer will always benefit these kids.
I do agree, these kids shouldn't be left in limbo. And (for the short term) maybe it would solve the current numbers crunch to just let everyone get up to 85 with transfers. But that won't fix the issue for the long-term.
We need policies that will work every year, and that coaches and players BOTH can rely upon.