[Ed. – On the other hand, if this were a popularity contest, we know who would have a commanding lead.]
Up to you. You can choose to believe that this is true or you can choose to believe that it’s a lie being told by the campaign to scare Biden voters into not being complacent. The wider his lead in the public polls, the greater the incentive for lefties who are lukewarm towards him to stay home on November 3 in the belief that he doesn’t need their vote.
Which, frankly, may have been fatal to Hillary Clinton four years ago. Remember that some election models gave her a 99 percent chance of winning. If you were a progressive who didn’t like Clinton but really didn’t like Trump and you saw data nerds smugly assuring people that victory was in the bag, you felt comfortable skipping the election or casting a protest vote for Jill Stein. We all know how that worked out in Michigan, Wisconsin, and Pennsylvania.