There's way more nuance than Lemmy pretends. It's difficult to deal with, because there's a lot of nuance and several grains of truth lying around.
They're afraid if someone on "their side" is out there yelling "I'm a socialist", that it'll scare the donors. That much is true.
Lemmy forgets that you need donors and allies to win elections. I honestly think many people pushing the "both sides" narrative actively want us all to lose.
We don't need to be as beholden to donors as the general Democrats are. We have a lot of room for Democratic Socialist policies. But if we use our platforms to yell about how both sides are the same, well, first, they're absolutely fucking not, and second, that's going to get people to stay home and lose elections.
We need to pull the party to the left. Partly that'll help win elections. IF we don't sink the boat while we're doing it.