That isn't really something to argue about, though either. It's something the school gives. All they can do is stop providing the financial aid and expel the student. It was the NCAA that restricted the ability of the student to play at a different member school and that rule is basically gone.
"Also effective immediately, Division I student-athletes who meet certain academic eligibility requirements will be immediately eligible at their next school, regardless of whether they transferred previously."
Division I Board of Directors ratifies transfer, NIL rule changes - NCAA.org
NCAA rules say an NIL deals cannot be tied to enrollment and the school cannot stop the player from going into the portal without a reason. It's not an employment contract (MAKE THEM EMPLOYEES!). It doesn't have a no compete clause.
Are you guys really suggesting that a Name, Image, and Likeness contract could legally restrict a player from transferring? I'm pretty sure that tying the contract to enrollment would violate antitrust laws and NCAA rules. They can be voided for a host of reasons (live x amount of miles from campus), but it can't stop the player from transferring.
The tampering allegation is between Wisconsin and Miami. It has nothing to do with allowing the guy to transfer.