Because while Malthusian assumptions are wrong and degrowth is not the answer, I do agree that there are limits to how much CO2 we can pump into the atmosphere, nitrogen into the earth, and plastic into the ocean.
Secondly because it’s a matter of choosing your battles. What is (relatively) easy: showing ICs that Bitcoin is net positive to the environment.
What is very hard: trying to change the decision-making rubric of the world’s ICs.