The latest growing trend is these fatties are now driving these motorized trikes every where, even in stores. In Canada the government gives them money to buy them as they are claiming they are disabled. They are clogging up the aisles in the grocery store I go to and then they ask someone to get something for them on the top shelf because they're too lazy to get out of their seats. The one thing these fatties could do to help themselves is walk! and they won't even do that ffs!
Some of the folks you mention here don't walk because they cannot and not because they chose not to. Although you do see many obese people using motorized carts, some people who use them do so because they are not mobile for other reasons.
My wife sometimes uses a motorized cart if her grocery list is long because she has congestive heart failure and therefore gets out of breath pretty quickly when she's pushing a cart. She also uses one when we go to Costco because that store is so large, there is no way she'd be able to walk through it. It would literally kill her.
A friend of mine is in a motorized chair all day everyday. She has MS and can no longer get around on her own. I'm positive if there were anyway she could get out and walk she would. She's been confined to this chair during her waking hours for several years. That can't be fun for anyone. He husband lifts her into and out of bed. I imagine he also helps her shower.
So when you see a person in a motorized cart at the store, obese or not, don't just assume they are too lazy to get up and walk, because maybe they can't.