It's a distinction without a difference. Ravens fans don't care how many MVPs Jackson may have. Like every fan base, they want to see their team playing until at least late January, preferably February. They've seen all Jackson has to show at this point. Recall Cam Newton, one time MVP. Carolina kept him around for years after that...and fizzled out. After 2015, he was there 4 more years and they appeared in one playoff game--a loss.
If Baltimore's goal is to just sell tickets and collect shared revenue, then sure--keep chugging along with Jackson and hope for a different outcome. If you want to at least take a chance to see a better outcome, you move on. If they get to the AFCC game this year, then sure--they will likely pay him. If they miss the playoffs or go one sand done--why should they?
Josh Allen is is a much different boat than Jackson. It's not comparable. He's a far better QB on a much better team.