Democrats don’t want to win and don’t have any true beliefs, they’re controlled opposition
No one cares what you “expose” about republicans anyway. People vote for who they’re told to vote for no matter what. They were told to vote for trump, they voted for trump, despite the fact that he’s a self-admitted sexual predator. They were told to vote for Biden so they voted for Biden, even though he is also a sexual predator, and a well-documented racist monster just like Trump of course.
By consolidating behind Biden they kind of cut off their ability to criticize people for being like Biden. And Biden is basically a republican.