This is an esoteric discussion as the presidents won't agree to become a minor league professional football league, but if this were to happen, it would shut down NIL's and no show endorsement rights deals tied to a given school.
Yes, the NFL collective bargaining agreement does not prohibit endorsement deals, but I am confident they cannot be tied to playing for a specific team. That would violate the salary cap. The Chiefs fans cannot start a collective and pool their money to lure a strong safety to come to play for the Chiefs. Phil Knight could not offer Patrick Mahommes and extra hundred mil in endorsements, but only if he signed with the Seahawks.
College could mimic the NFL if it wanted to, and move towards a much more even playing field. It won't. The NFL's financial parity and salary cap have made it into the giant that it is, because it is one of the few sports where championships are earned through well-run organizations and not just purchased by the highest bidder. See the Dallas Cowboys/Washington Commanders versus Green Bay in this regard.