Food is fresher….so you like making unnecessary trips all the time regardless of how you get there. I do grocery trips once every three weeks. I also go on tons of camping and back packing trips and walk tons of miles. In short your argument is you rely on being in a neighborhood. How about folks who who grew up in smaller areas and want to be near family whom live there? Want them to pack up and leave and live in a tiny apartment?
I use trains and carry a loaded gun with me everywhere. Public transports I carry a 44 magnum concealed.