I figured out a while back why some people are just too fat, and it is one little thing. I'll explain.
My mother became a JW back in the early 1970s, and at the time her weight was average, not skinny, nor fat, or obese. The longer she was in that religion she just got bigger and bigger. I haven't seen her in the last 18 years, but I have had relatives give me information on her from time to time. She has gained so much weight now that she is in a wheelchair. I know why, and it is not because of some medical reason that would cause it, but rather she is attempting to kill herself by food. A few years back when I was still a JW, my husband and I went to visit her, and we went to the local KFC, all you can eat buffet. The amount of food my mother took was astronomical. She consumed 3 heaping plates of food and one heaping plate of dessert. It was enough food that my husband and I could have spent the next four days in complete meals. I know my mother has some mental issues, but she refuses to get any help for what is bothering her. She has said on a number of times she is waiting for Jehovah to take over, and then he will give her a perfect body, so what's the point of caring now.
The main problem with those involved in religion (cult or not) and don't keep their weight in check or care how big they get is because they all think they will get a second opportunity to have their god fix it by giving them a perfect body. I too thought this same way for many years, and I'm paying the price now. My weight is a constant struggle that I am always dealing with.