Honestly? It would keep him hopefully from having a close enough election to contest it, game it, and potentially evade punishment for the crimes he's actually on trial RIGHT NOW for committing. Then there is precedent for punishing a president and guess who can be next?
Biden does not sit on a button that says "lower gas prices" or "defund Israel" or "hold trump accountable" or any of a whole variety of things in the first place. Can he do more? Sure. Would I trash him because everybody has to do the exact right thing with the exact right issue every time or I'm going to take my ball and go home to let the other guy win and escape punishment for the first time ever? Fuck. No.
Get precedent for punishment, then punish them all.