What are your opinions on people who are fat?

I am not opposite to body positivity, but I see people getting fat because they just do not take care of themselves eating whatever, not being active kyu ki just because!!! cuz they are too busy or dont care. People around them like family or friends(not toxic) say that u are getting too fat, they rant about body positivity. Why dont fat ppl understand its for them their well wishers are saying? (I am not fat, none of my friends are, i didnt say anyone to get thin/ to get muscle who is too thin) i just want to know people opinions.