It may very well be Joe Biden. Democrats know that Trump is going to win. They would be foolish to put out any viable candidate at this time. So it has to be Joe at this point.
It is obvious that Joe can't speak for more than 5 minutes at a time. He cannot successfully read a teleprompter. And even in a 5 minute speech his mind wanders such that he can't get through a single sentence without losing his train of thought and forgetting what the sentence was even about.
Joe is the Democrat best candidate though. Voter turnout will be low on the Democrat side. If he chooses Stacey Abrams as his running mate, that turnout will come up a bit, but most people don't even know who Abrams is or what color her skin is.
That's how I see it. But I agree with you. It will probably be Joe. Nobody else in their right mind wants to touch this candidacy with a ten foot pole.