I don't believe the polls either but the Democrats have been working way too hard to separate themselves from their progressive base. The mythos of centrism and a normally distributted body politic is to blame, but it continues to cost them. There is no center to court. If Democrats lean into progressism, they'll win elections. It works. If they lean into trying to court Republicans, they'll continue to fail.
If Biden goes unabashed progressive, unabashed enforcement of the rule of law against insurrectionists, he'll be fine and 'centerists' (rightwing assholes who don't want to be branded as rightwing assholes) will be forced to come along.nRight now he's losing jg his base through his weak domestic policies and even weaker foreign policy. You can argue his hands are tied but that's really not my problem. It's his problem if he can't navigate to specific policy goals against resistance. It's literally what he has been elected to do
If Biden tried to court a cult based around lunatic conspiracy theories that he is a lizard person, well good fucking luck.