It doesn’t matter whether you believe in it or not lol, it simply is that way. I can send you a Google maps link to somewhere in the US that is a food desert simply by virtue of being a large suburb with residential zoning.

My guess is your conception of a suburban area (relatively densely populated?) is a bit different from ours in the US. Also for some reason you seem to think that because your area doesn’t have zoning or enforce it, other places don’t.