I don't know what you're sorry about. There's nothing wrong with that idea. It just isn't feasible to have 8 billion people all living like that. If cars were only used by a sustainably small number of people who live like you, then it's fine enough.

The problem is the "lot of other people" issue. Your way of life works well only if most people forgo it. There's nothing inherently wrong with it in and of itself.