Not to mention, the damn sun here, it gets absolutely hot here at times, even I don't see myself walking halfway to the other part of the parking lot just to leave a cart when I already walked all the way from the entrance carrying all of my groceries, I don't see myself returning in that case.
Lost me here, nope, nooooope nope nope nope. The weather is the least justifiable excuse -- Someone has to walk all that way to return that cart in the hot sun if you don't. If anything, making someone else do it is worse because of that weather.
I also saw you throwing out "but they have employees who do that" in another part of the thread. You wouldn't throw trash on the ground instead of walking it to a can just because a place has a janitor, I'm sure. It's exactly the same logic, and the reason you wouldn't ruin a janitor's day is the same reason you shouldn't ruin a cart collector's day.
I get that your local shop sucks for only having one corral. I really, truly do. But you know what I do when my closest store has practices I can't deal with? I don't make someone else clean up after me, I take my money elsewhere.
I got my first one of these when I was 21 and in the best shape of my life. Accidents, injuries, and unpreventable diseases happen, and acting like your comparative good luck means you've made better choices than those who have been less lucky by implying they've been "unhealthy as hell" is kind of gross.