I mean, I do think actually acting on that statement is foolish… but it doesn’t mean they never made the statement. Just because we believe something to go against the common good doesn’t mean people of generally good will don’t take those actions for what they believe to be good reasons.

The situations sucks. It has sucked for a long time. And it’s not going to get better quickly or easily. Unfortunately refusing to act in the main way you can to make that difference makes it that much harder and take that much more time.

It would take a substantial amount of organization to make a third party viable

That’s the thing, FPTP doesn’t allow that. It doesn’t “make a third party viable” even if you get all the votes needed. It’s “usurp one of the two parties” instead, as whichever party failed to conquer the contender gets subsumed by them, if their ideologies are in any way compatible.