That would ruin the sport. 1 players trying to learn new schemes would slow down their development. 2 Any coach could leave a take the whole team with him. 3 It would make it so the players run the team and they aren’t mature enough for that. If they make it to the league they can call their own shots.
I should have been more specific.
I am for the one time transfer rule for all players, just like in every other sport besides D1 college football, and bball. It hasn't ruined any of the other sports with mass defections. Players can't be mature enough to choose a school to attend. Mature enough to vote. Mature enough to enlist. Yet too immature to decide if a university they are attending isn't the right one for them for whatever the reasons.
Coaches leave, All The Time.
Players leave, all the time, most get waivers already, especially QBs.
As for your reasons above.
1. Schemes change often on teams routinely. Coordinators being replaced, coaches being fired, etc. No one is saying we need a rule to prevent that slow development due to coaching turnover.
2. No coach can take a whole team. There is the 25 limit of new scholarships to each University. So that's the most he could take. If he did, he would lose out on an entire recruiting class. No coach would do that.
3. The implication is that every college athlete is destined to be a problem child and want to destroy instead of build. I think Saban, Dabo and others would tell you that is false. Those players aren't there being subordinate and following orders because of transfer rules. They are there because they want to be successful and be led to it.