I have no idea what your point is. Is your point that those “do things” and have responsibilities support destroying our planet through climate change?
People who care about the environment are naive hippies, but the business people are the serious ones who “take responsibility” and know how the world works
I think the point is that “signing” an open letter is mere slacktivism, barely one step above clicking “like” on a social media post. Very little effort required, or results obtained.