Yes, but you're assuming those affordable cars are for purchase. If Elon can make them self-driving, you get the benefit of never having all the expenses that go with vehicle ownership, and he makes the spread between an expensive electric transportation appliance and people paying dirt cheap rates to get from A->B (because electric is so much cheaper per mile than petroleum).

What? I'm not assuming anything. All I did was post a link to Elon Musk's own words.