I never understood why people care so much about buying electric cars vs number of kms / miles put into it. They are more expensive to manufacture, but cheaper

I never understood why people care so much about buying electric cars vs number of kms / miles put into it. They are more expensive to manufacture, but cheaper to use, therefore I believe at this point all taxis / Ubers should be electric. Maybe if Elon didn't push ,,self driving'' so hard and just thought about all the needs of taxi companies (maintainance guarantees), we wouldn't have as many car sales, but the charge points and maintainance (which can have higher margins than traditional cars as it is cheaper) would make up for it, and air in cities would be much cleaner already.