I am good friends with someone who works with detained criminals and thats not how most thievery happens. Besides alcohol (but addiction is a different story) baby food is the item most often stolen. Packages of sliced cheese are also common.

The criminal poor don’t go to the store to steal specific items they go to buy food like normal and with every item they are counting if they will have enough on their account. When they get to their budget limit they try to swap some stuff to make It work. If that really doesn’t work they sometimes decide to take a more expansive items from their cart and smuggle it out without paying.

Of course this wont be the exact scenario for all store-theft but its what i hear is most common at least where i live.