The notion of “food desert” is (like “poor”) problematic.
A major definition includes living more than one mile from a grocery store. Really? If you can’t walk 20 minutes with your own cheap grocery cart, distance & food isn’t your problem. My mother & I did more than that regularly when I was under age 9.
Most people don’t live in a desert because there’s insufficient food there. MOVE. Yes it can be done - if being in a “food desert”is a problem, then act like your life depends on it and get out!
How about a delivery desert?
One way to avoid living in a “food desert” is to refrain from rioting and burning down the store.
The other problem with the “food desert” is that some of these maps don’t include ethnic grocery stores and hole in the wall retailers that do offer food but it isn’t a chain grocery store so it doesn’t count to those doing the map.
I remember a Glen Beck episode where a food desert in Austin had a Whole Foods grocery store in the middle and several ethnic groceries - way better coverage than my suburb.