Because the fuel used by cars is the least of the problems with them. The real issue is the sheer about of space they take up, which ruins cities, destroys housing affordability, destroys the population's health because people can't feasibly walk places, etc. Oh, and by the way, the huge amounts of extra concrete they need for wider roads/parking lots/parking decks is a major contribution to climate change too.
Electrification will not fix this. Only ceasing to bulldoze our cities in a futile effort to accommodate will fix this.