From my perspective as a fan I totally agree with you. I still think it’s in the players best interest to have the increased freedom, and for that reason I support the open transfer rules. It’s just a bit sad to think it’s unlikely we’ll see another another warren carter, etc.
Yes, increased flexibility and fluidity gives the players more options and opportunity, as does early entry into the NBA and other professional leagues. There are abuses, of course, and instances where a player may be harmed, or just make what proves to be a bad choice. But overall, it's better for players if they are allowed more freedom of choice.
More choices and greater freedom of movement changes the environment. As a kid, growing up in a college town, I followed players closely throughout their college careers (typically a full four years) and developed strong connections to them, seeing them like big brothers. I had my favorites, of course, but it seemed we were all part of a family. That's nostalgic, I realize, and it dates me. Athletes have myriad choices and greater freedom. I get that, and I'm genuinely happy for them and their families. But it creates a different environment for players and fans alike--more businesslike, more fluid, less relational.
That's reality. Cue Dylan: "The times, they are a changin'."