There's a lot of this assumption that democrats get more votes by going for moderates. Meanwhile they've alienated the entire left, and (I know, not a representative sample) but my Lemmy feed is jam packed with arguments about "you have to vote blue to stop fascism" vs "I really don't don't want to vote in favor of genocide". No one seems to actually like the democrats, they're whole appeal is basically "not fascist".
Bernie Sanders got people excited, and while not exactly a leftist, he did represent a move toward the left. But they couldn't let Bernie happen, he was too radical, apparently. You've heard the term "Bernie bro", but where are the Biden bros? They aren't, because Joe is boring.
So I don't think they "have to worry about moderates". The post here claims that if they could motivate people to go vote, they'd win. So offer something fresh. Present a real alternative to the inexorable right wing decline of all of US politics. Do you not think that would work? Why are they 0% willing to consider it?
Or, bring a tripod and crank the shutter speed to like 10 seconds or something. Then the tram becomes a giant glow snake emerging from its burrow.