There is another reason to do so: The sincere belief that the alarmists are a threat to human survival. Their unconditional animosity against much-needed energy sources, if acted out in the political sphere to the degree that they wish, would doom billions to poverty and death.
There is no doubt some risk in continuing to use fossil fuels the way we do, but governments are not who I would trust to quantify and hedge against that risk. They are much more likely to overreact or underreact for political reasons, costing the world countless lives.
This is an unpopular opinion I'm sure. The technocratic idealists here who align with the alarmists are positive they know better how the world should run than those SUV-driving rubes out there, but such paternalistic hubris has gotten mankind into huge trouble before.