This is 100% true. Every person I know - and I know a lot of them because I'm one of them myself - who already seriously cared about the environment pre-AI, including making personal sacrifices for it, doesn't place outsized importance on AI's environmental impact compared to other sources. Every person who frequently brings up AI's environmental damage are those who honestly never really cared about the environment/climate, at most paying lip service to it for brownie points/to feel better but never took any actions that would inconvenience themselves.

Because we who actually care about this subject go through the effort of educating ourselves and tend to use our energy in ways that actually make a difference, that are effective. Because we care about making an impact, not about brownie points.

People are just embarrassed to admit they're scared they might lose their job. They shouldn't be but they are because they've attached their identity to their career and to the concept of it making them uniquely skilled and creative, in a way that a machine could never replace.

Please don't take this as saying they are replaceable by AI. Maybe it never will. That doesn't matter, what matters is that they're scared that it will, and they're too embarrassed to admit they're scared of it, so they point towards the environmental damage.