So.... fat stigma is so much a thing.
People don't die from fatness, they die from systems failure... be it respiratory, circulatory, neurological, etc.
Fat doesn't kill you. Fat has never killed anyone.
We would die without fat, as our brains are almost entirely made of the stuff.
Fat is vital for survival, and it doesn't CAUSE death.
Something like a heart attack (aka circulatory failure) can kill people, and it happens to BOTH fat people AND skinny people.
Being fat, or medically "obese," statistically speaking, gives you a slightly higher life expectancy ON AVERAGE than someone of "normal" BMI.... because satistics; they don't make shit up.