I had this discussion with a group of women not long ago, some of whom assumed the overweight women they'd seen using mobility scooters deserved no sympathy.
I was rather taken aback that only a few said there are illnesses which make normal mobility difficult and weight gain can be a result. There are also drugs that people have to take every day (I am one of them) which cause weight gain.
My weight has increased considerably since I was healthy and at work. I do not stuff my face, I am as active as I can be although retirement has meant I can indulge in sedentary pastimes like reading, writing and art-based activities, which doesn't help. I clean the house, walk, swim when I feel up to it, cook healthy meals and enjoy sight-seeing rather than lounge-around beach holidays. Most of our day trips out involve walking around. I do what I can. I value my mobility.
However, I am now overweight. I am far from being a couch potato though and I don't eat sweets, crisps, pastry or junk food. I eat cake occasionally, when out with friends, drink wine and G&T but not every day and in moderation when I do.
I have stopped trying to justify my weight gain to those who imagine all who are overweight are greedy, ignorant slobs who have brought it on themselves. It wasn't so long ago I ran, played tennis, enjoyed hill-climbing and I have even had a go at orienteering, abseiling, and kayaking when younger and fitter.
Don't be too quick to judge.