It's not a crazy idea, and the value is about right. You do it if there are guys you really like who are still on the board, you expect to draft late next year, and you aren't sold on the 2021 draft class (believe me, the Bills already have a pretty good idea what the 2021 class is going to look like). You don't do it if you have any serious doubt that Josh Allen is your franchise QB.
Isn't that a good reason to want an extra premium pick this year?