You're preaching to the chorus my guy. I know you're technically correct and you can use a lot of long words.
But the reality is that, the way things are right now, taking the actions you are suggesting people take makes it more likely that Conservatives win, and that makes it less likey that the changes you want to see get implemented.
It's not that ti don't believe you. It's that I don't believe the solution is "let's convince half the population to change their voting preferences".
A realistic, not Ideologic, solution needs to work within the boundaries of things as they are, not as you wish they were.
Yes. It insanity. That's why splitting the vote is a bad idea. The US would likely still be a democracy, if not for the split vote.
Of course there are examples to support your argument, that doesn't erase all the counter examples that are much more catastrophic.
Your good intentions can, and in my opinion do, more harm than good to the very cause you explicitly support, simply because you insist on ignoring the behavior or real people on the present.
Not to mention the implicit assumption you're making that this is the one-topic for voters.
I'd eager this is quite low in the priority list of the average voter, below housing, cost of living and identity politics.