I mean, people refusing to participate does move the needle a bit. I think as awareness of the problem grows (via articles like this), there will be more demand for less wasteful NFT platforms.
You're probably right that the same is not true of Bitcoin. In my experience the digital art community is less nihilistic than the Bitcoin community about climate impacts, if only because Bitcoin has had a longer time for people concerned about the climate to self-select out of the community.