[labcomputer]

Children of certain ages are challenging, I'll grant you, but the rest of this is just dripping with privilege.

Go visit any of the rougher parts of a big city, and you'll find plenty of low income people transporting groceries and commuting on bike (You can find them in small towns, too). Look for people with plastic shopping bags slung from the bars. It's not just viable, but absolutely essential.

And it's not limited to just people with low income, either. A rack and a set of nice panniers can easily carry a week's worth of groceries for a single person, including bulky items like milk.