You underestimate the blind loyalty of identity politics among democrats. The fact that Republicans are the party better known for it, there are democrats that are equally dedicated to voting blue, no matter who the candidate is, and there are plenty of others in the party that genuinely see Biden as a good president.

It’s the folks that aren’t invested in the two party default that voice dissent to the choice. You obviously aren’t, and I know I’m not. But the reality is that those of us on the left are still stuck voting against a candidate like trump rather than having a real choice. But we are a minority, and we’re stuck with the reality that a change in presidency or candidacy at this point is disastrous on its own.