Also, the true purpose of humanity is to destroy the earth via pollution

No. The purpose of a system being what it does, the purpose of life is to consume low-entropy states and excrete high-entropy states (it’s thermodynamically necessary to do that if you want to decrease the entropy in a localised system which is all that life ever does), overall accelerating the generation of entropy in the universe and thereby hastening its demise.

Humanity’s role in all that is to colonise the stars to do it all even faster.