"Grow your own veg? Kill your own cows? Quarry your own stone? Distill your own petrol? You're Exxon's bitch."
Yes. Can do all of those, choose not to for convenience and pragmatic reasons (you'd be amazed how often I don't need to quarry stone) but, if the need arose, I could (although I'd probably brew and distil alcohol instead of refine petrol, petrol isn't great, even with ice and a slice)