If I read you correctly, then perhaps we don't disagree on some key facts - At some point the costs of extracting fossil fuels will be prohibitive compared to renewable energy extraction. The problem is, with all the government encouragement to ignore the science and subsidize the fossil fuel industry, that point will likely occur after irreversible environmental degradation has occurred, with billions of human lives deeply affected. Maybe in a Libertarian view, that's okay, since the Holy Market is on a pedestal above human life. For me though, Capitalism solves many problems, but certainly not all of them, including environmental degradation.
I am guessing that you do not have a good feel for the risks, or lack of them, and the timing.
I think oil will pass the threshold within a decade. All that fracking speeds how quickly fields deplete their reserves.
What oil remains will be more expensive, and more difficult to extract.
It will be difficult to extract and refine much more fuels than we already do, but if we manage to increase flow, it will only speed
up the time frame when the price will increase.
For the sake of discussion, let's say it takes 20 years to reach economic viability .
The highest emission growth year on record, increased emissions by ~3 ppm per year, so 20 years at 3 ppm per year would put CO2 levels at
468 ppm, so the forcing warming that would cause would be 1.58 X ln(468/408)=.22 C
Now if a century of historic readings are any indication of future patterns 75% of that .22 C will be in the minimum temperature,
and only .055 C will be in the maximum temperatures.
We have all already lived through periods of greater warming!