There were many extremely destructive events in the past that were perfect "normal", in the sense they're not man made, but we might not enjoy happening now.
So if there's a climate change happening ; and if it is negative / bad for us ; and if some actions we take can make it better and some can make it worse... It feeels like a no-brainer, that religion and capitalism and myriad other talking points of dissenting only distract from.
I.e. Even if without human kind, some curve would have a spike ; and that spike is bad for us ; and we can flatten that spike ; them umm lets do it.
It feels fairly intuitive that "pollution is bad" (we can argue how bad), and "adding c02 and making everything crazier is bad" (we can argue how much of the bad is our contribution).