Notice how it’s protest against trump and not Biden rally draws people.
Where were the 81 million in the year leadi up to the election when Biden would make “appearances”?
Biden isn’t the showman Trump is. Trump is all about the spectacle, which led to both the increased passion and interest in attending his rallies, but also the increased controversy. I don’t think there can be any doubt that a larger than normal amount of people voted against him, and without a popular 3rd party candidate, those votes went to Biden. The public appearances were also drastically scaled back on the Left, whether or not you believe the reasons to be justified.