What gets lost, is that the opportunity cost of "fighting/stopping/reversing" Global Climate Change is that those resources are not available to help us adapt to Climate Change.
You have touched on the essential fallacy of the Climate Cult.
In the event that humans are just along for the ride, climate wise (as I have suspected all along, because the climate has changed over the history of the planet without any human help) all that will be accomplished by divesting humanity of the very resources needed to adapt and survive whatever Nature throws our way, will be to lessen the chances of humans surviving. In the meantime, other animals will relocate or adapt to their new environmental niches (even the bugs we are supposed to eat).