20 years ago somebody told me that installing Gentoo would make my computer performant enough to run video games. I no longer play video games, but I have been using GNU/Linux variants ever since.

Not a denier, but people fear the immediate costs. It’s not clear what meaningful climate action looks like. But realistically it would very likely mean a higher cost of living in the immediate future, because not all economic sectors can be trivially decarbonized. There are also possible immediate benefits. But in any case that’s what people fear.

Users upvoting/downvoting leads to a hivemind, even if the moderation is not complicit (which it often is).