Well, they don't "just" keep saying it, it's just a thing that Democrats say sometimes that far-left children like to fixate on like its the only thing being said. There have been numerous well reasoned arguments this election cycle for voting for Biden, if for some reason you were in a coma from 2017-2020 and don't have any frame of reference for what we're up against.

There are millions of reasons (every undocumented immigrant that Trump wants to genocide, for starters) that you should vote for Biden in November. I'm tired of people being reductive and acting like the situation isn't dire right now. Anyone with a functioning brain should be in agreement about, of the options we have, which one we should take.

Biden, despite his many flaws, has done more for the working class than any president in my lifetime. The people on the left pretending that there's no compelling reason to vote for him are fucking morons, especially those who insist that Trump is somehow the same.

and that will be the downfall of Biden

Just remember, when Trump wins like you want him to, and Fascism takes over, just like history books today point the finger quite deservedly at apathetic Germans who let the Nazis win, future generations are going to point their fingers at the likes of people like you, who decided that Trump wasn't worth defeating - and there's literally only one way we keep him out of the White House next year.