If we are in overshoot scenario even reducing emissions may not be enough. There are warming gases currently trapped in permafrost, the natural carbon storage capacity is very dynamic, so global warming may target new (worse) equilibrium beyond what we think we can achieve in best case scenario.
And if my grandmother is dead it's too late to ask her to borrow money. It's easy to chain together low probability what-ifs and come up with everything on fire.
