I dunno I have known many true believers in electoralism among DSA-adjascent types. Obviously the capitalist parties are rife with cynics, climbers, and "I got mine"s, and this bleeds into ostensibly left spaces, but I think most are people who are seriously committed to wrong ideas.

I know one person that has literally never won a single campaign they've been a part of. They've been the campaign manager for several. They call anyone that isn't into electoralism an "ultra" (lmao). And despite all of this, they never actually plan ahead for campaigns and they always start very late. Like... they give their opponents a 6 month head start. For seemingly no reason other than they don't even think about recruiting a candidate until around the filing deadline. And it's not for the money, they're usually unpaid for the work and they have a well-payinh job outside of this. And they have terrible political instincts.

Based on this and other experiences I think it is more that most lefties learn self-criticism and get over their incompetent electoralist phase so the only people that do electoralism are naive baby leftists and the incompetent and arrogant.