Plus it’s good if some of them win and pull the party in a reasonable direction. And having decent people in government is always nice.

The structural flaws in our elections that force us into a two-party system are deeply entrenched and they aren’t going to change until this place burns down and starts over. If you aren’t willing to vote for a politician with good priorities because they were nominated by the democratic party, you can still be an influential voice but come election time the system is already designed to ignore your vote.