This is quite right, and there was nearly zero pro-biden neither, nobody really cared about Biden or to be fair any other candidate neither. There was a huge following of Bernie Sanders, if he got the nomination there would be a ton of pro-bernie people, but aside from him, everyone else just nominated because they were not trump and that's how the election went. Even if Hillary had the nomination once again, she would have won that time, it was clear. This time its not just about what trump does, its about its been 4 years since trump left, so its about if people forgot about it or not.