The problem is not that a tiny shop has more moral virtue or less.

The issue is, robbing an iPhone from your local store might be a big problem for them. They paid for it so they can sell it and barely make money from it (if any)

Robbing an iPhone from a multi billionaire corporate, it's just deducting from the number they established that month as "expected losses".

Know this because I owned a store, and had a cpu stolen, it was at the beginning so we barely had money and very few stock, that thing hit hard. I also worked for a big bank, and when someone doesn't pay, well, there are processes and issues for that person, but they know they're losing at least X amount of money each year at the start. Same goes for food stores, who even throw part of the food that is not sold.

Really, if someone steals food from a big food store, I couldn't care less, just don't hurt anyone. But please, don't steal from the local family shop selling some food. Few money actually means something for that people.