It’s not just about winning, it’s about ideology. Embracing demsoc candidates wouldn’t just be a change in strategy, it would be a change in the party’s core ideology. Ideology is why political parties exist. Political parties are usually based in ideology, that’s why in other democracies there are liberal parties, conservative parties, socialist parties, Libertarian parties, etc. But here in the US we don’t have a system of political ideology plurality, so the two parties that we do have are often fighting internally to determine what the core ideology of the party will be.

You know why so many Democrats don’t like demsoc candidates? Because they’re not demsocs. They’re social liberals or neoliberals, and they want the Democratic party to remain an ideologically Liberal party.

If our democracy were more like most every other democracy on the planet, the neoliberals and the demsocs would each have their own party, and they wouldn’t need to be engaged in this constant, zero sum fight for control of one party.