Is one astute Dude!! The first part is His intelligence, the second is My addition..

What you miss is that your "world saving" batteries DON'T get built without a LOT of energy...that energy is mostly oil. You may save some oil driving the car...but you used just about all...if not all or more...oil making the car...because batteries need a lot of energy to create. Lithium is in limited supply you're NOT going to turn ALL the vehicles into electric.
The point You fail to make is what to do with a few million pounds of Toxic Waste, Spent/worthless batteries? None last forever?? A suggestion, Load them up on elons rocket ships and destroy the universe at the same time as Earth..