Biden is still considered a normal center left white man. Not some woke guy the right tries to make him out to be. That will always resonate with white voters.What you're proposing is that there exists a significant section of voters who would support a vegetative Joe Biden fighting with half his own Democratic caucus over a Kamala Harris with the full support and backing of the entire Democratic caucus and the co-sign of figures like Obama, and I just don't believe that at all. What is the driving motivation for these voters? If you're that explicitly bigoted that Kamala Harris being a woman or black is a red line for you, why would you be voting for woke Biden over anti-DEI Trump in the first place? Explain this hypothetical voter's mindset.
Kamala is a black/indian woman that doesn't have much likeability and would likely have the image of being more left than Biden. She would face the issues of racism and sexism. There are thousands upon thousands of people that will not vote for a woman as President. Her being black makes it even more likely they don't vote. She would need to be a once in a generation talent like Obama to overcome this, and she's not. Kamala would lose the total white women vote by an even bigger margin than Clinton or Biden. And she would lose white men by a bigger margin too.
The white people we are talking about are independent, middle of the road or moderate conservative voters. Trying to solve that problem by having a perfect VP that can provide appeal to these voters and in the Midwest doesn't work when she's at the top of the ticket. Because in this unique case, the spotlight is all on her and she would be demonized to death. The VP wouldn't matter.
There is no possible way she gets to 270.