I never suggested we should suddenly remove fossil fuels as an energy source, that is a huge exaggeration. We wouldn't have needed to do anything suddenly 40-50 years ago when we started to understand that there was a problem, and we won't suddenly remove fossil fuels in the upcoming few years either.
But that is also a false choice: Not all CO2 emissions in the past 40 years were net beneficial. I firmly believe humanity would have done better with fewer (not zero, fewer) flights, less (not zero) beef, and fewer (not zero) fossil fuel car journeys. All while continuing to raise people from poverty and providing real improvements, of course.