Dems don't rely on thinking voters. They rely on "blue no matter who" and "anyone but Trump" voters.
They are running out of those people in a hurry.....
See Romogo's post for clarification if you need more proof.
And my observations from my social group is completely different. Every Wednesday I would hear these old guys talk about Biden. He isn't doing the best, but he's better than Trump, yadda yadda. A month later, they are ALL saying they can't vote for Harris. So calling people blind partisans based on their own observations, in there own social groups, which may be different than yours, is a bit silly.