Your take is too fatalistic because any reduction in Co2 emissions is helpful. It isn't an all or nothing thing.

The cost estimates for eliminating Co2 emissions are also not very high. In the range of 1-2x total GDP. Would be doable if 3-5% of GDP is spent over the next 20-30 years.

I agree that all oil will be dug up and sold but there is a caveat: not at any price. If solar and wind continue their trajectory their dominance is inevitable.