Let's ignore cheating for a moment. I realize that it is likely that cheating took place. That said.
I know people who voted for Biden in '20 because they hated Trump's personality. They were the same folks who voted for Trump over Hillary in '16. So there you go. Many FReepers won't want to hear this but at times Trump was his worst enemy.
How do you know that? or rather presume that?
Trump was less “abrasive” in 2020 than in 2016. So your alleged voters don’t have that excuse. And Democrats have said things that are several orders of magnitude worse.
At least they did/do not exist in sufficient numbers to make the steal “unnecessary”.