> It is insane to suggest capitalism won’t solve this problem by the time it actually needs solving

That time is now, and it has failed.

But it is crystal clear that we should decrease our current CO2 usage as much as we can, even at the (imo small) price of personal luxury — even if some new technical advantage can solve the problem, we should stop at least speeding towards the cliff, and try to break as much as possible.

You are forgetting just how much bigger the planet is then us.