I think she gets a huge bounce if she’s the President thrust into a role she did not ask for or seek. It’s a pretty typical human reaction to cheer for people forced by circumstance into an unexpected role. I think she also gets four months to show that she’s Presidential material.
So that’s the pragmatic part. I also believe that President Biden has shown he’s incapable of governing, and that we have rules regarding that situation. In fact that’s why we have the position of VP.