I think this conflates capitalism with lack of coordination. We could fix global warming today via regulation. Even if our government was socialist, it would probably still not be curbing emissions due to trying to achieve some other non-capital goal.
Second, there isn’t any need to falsely imply our species is going to die because of climate change. No model points at that. Billions of people having crappier lives and dying sooner should be enough motivation.
Because the models don’t support your statement.
Billions WILL have worse lives due to this. A very small subset of that will be because they are on the verge of starving.