All can say is I am quite compact in my frame (10st), not saying I am a model of fitness at all - my liver and kidneys are drowning out the screaming
from my arteries to eat a bit of fruit and run once in a while
But if I had paid for a seat on a (full) plane and I was crammed into a seat right next to some huge ass [insert all hatred of insanely oversized
people here] I would be pissed. 1) It's a safety hazard for people to be that large. 2) I paid for the amount of space / weight I used.... I
would feel cheated 3) My objections would now be ruled err I don't know obeseist?

cos a court has ruled in their favour?
There are only a few medical reasons why people get 'huge' (diameter not height!) But there are so many huge people. In history only the uber
wealthy had the opportunity to live lives comfortable enough to achieve such girth - now you will see multiple examples in any high street.