Not for everyone. If everyone tried to use a personal car at the same time it wouldn't work. It's also worth bearing in mind that when people talk about "the automobile", what they're really talking about is the roads. Automobiles are useless without roads, and there's only so much space.

A lot of this comes down to having too much of a good thing. We are really bad at detecting when we've gone past the point of too much, and we're even worse at undoing it once we have.