The irony is that this is probably true, but the greater project of suppressing any acknowledgement of climate change exceeds the possible benefits that aerosol injection might afford even to GHG emitters. It’s actually pretty goddamn frightening because it means these people are ready to take the whole damn ship down around them.
ETA: Don’t get me started on how weird it is that there’s a pre-spun conspiracy theory in chemtrails, one that makes zero sense but happens to align perfectly with making geoengineering even more difficult. But now I’m being conspiratorial.
The strategy still seems pretty bad to me. Even if fossil fuel lobbies convince MAGA-types in America that there's no climate change, other countries may do their own geonengineering. Nothing prevents areas like China and EU from starting their own programs, and thanks to more successful education systems their populations mostly don't have such anti-science sentiment.
Check out the open letter to ban geoengineering research by European scientists
https://www.solargeoeng.org/
Having the political system with the largest military on earth doing your bidding is a very good first step, if your goal is to make sure we do nothing while the whole world burns.