One of these guys is promising to go dictator, eliminate democracy, and seek retribution against those that "wronged" him. Not hard to see why so many are committed to voting against him.
This poll isn't the knock against Biden that many think it is.
Also, at least 27 percent of bears shit in the woods.
I mean what other choice is there? The way US elections are designed (electoral college, distribution of state representatives, re-drawing local districts on whims, unlimited amount of money being able to be poured into campaigns without any oversight or even reporting requirements, etc.,) voting for a third party is throwing your vote away. So you vote for the lesser evil. Unless you are so brainwashed as to vote against your own self-interest out of fear of the other side.