We all cause wear and tear, ita just a matter of degrees when it comes to weight- the heavy person walks through a store 1 time, the skinny person walks through several times, which does the more damage structurally over time? How do you calculate?
Well, then you’re stuck proving the skinny person shops more than the fat person or takes more trips through the store when they do.
Honestly, we probably shop less than fat people because we don’t eat as much food.