This spoiler effect makes it really imperative to actively vote for Harris if you want to see any kind of climate action going forward.
Anyone who call to imperatively vote for the red and blue party is an enemy of the climate cause and of humanity. If you want to see any kind of climate action do not vote or advocate for the parties and politicians that have cycled in power for the past decades and have brought humanity on the brink of extinction.
There's plenty of people who are not fine with the current system that would vote for a third party. I'm gonna make an assumption less stupid than yours and claim that actually most people are not fine with the current system and would gladly vote for another candidate if it wasn't for the narrative spinning the fight between red and blue.