I think the miscommunication is that you’re looking for a game-theory explanation for the best way to vote given a desired outcome, and TDD (forgive the shorthand) is doing a higher-level analysis on large-scale electoral trends and demographics that explain a shortcoming in the democratic campaign strategy. Even working within the 2-party electoral system, democrats have been leaving a lot of voters on the table, and the only outreach they’ve been doing for those voters (who are getting more and more frustrated) has been to scare them/shame them into falling in line and swallowing their scruples.
The reason why it’s dumb to paint Greens or other third-parties as ‘spoilers’ is because of this implicit assumption that those votes will trickle-down into one of the two major parties if they weren’t there. TDD is pointing out that Greens (and RFK before he stepped out, and PSL, ect) are filling political voids that the democrats and republicans have left open by not addressing the concerns of those voters. Assuming those voters would simply make a different choice ignores the fact that there was something about whatever third-party candidate that was motivating them that isn’t present in the 2-party candidate. That voter is about as likely to decide not to vote at all as they are to decide to give up their scruples and vote for the party that they were actively avoiding in the first place, especially when that candidate has refused to give those voters/those interests representation.
All of this analysis is on top of a foundational understanding/materialist lens that suggests that the US is heading toward economic/capitalistic collapse independent of whatever electoral showmanship is happening every 4 years. This game-theory bullshit is completely indifferent to the environment that is actively pushing voters away from the center and into more and more extreme populism.
This is fine if there was any indication that the underlying problem of fascism in the US is going to be addressed by the incoming administration, or if you believe it is addressed by voting against it. The problem is that many of us don’t believe either to be the case, especially when the current campaign strategy has been to grant concessions to those nationalist solutions while turning away from socialist ones.
When neither of the most likely outcomes address the continued growth of fascism inside the US, the ‘game theory’ of electoral politics suddenly seems like a naieve indulgence more than any kind of solution, even a temporary one.