[Retric]

I gained 100 lb in less than one year. Most of that showed up in 6 months.

That's the side nobody talks about. Losing a pound in a random week is easy. Keeping a pound off for 15 years is much harder and I commend your resolve.

[torrent-of-ions]

If it's hard then you are doing it wrong. The point of the post you are replying to is that people shouldn't "go on a diet" and spend weeks or months not enjoying their life. Instead you should find a way to eat a normal amount of food and enjoy it. Then you'll lose weight and never gain it back.

[Retric]

I don't mean hard as in will power. Rather, there is a huge trend to gain weight as you age. http://stateofobesity.org/obesity-by-age/

PS: The 65+ numbers seem to be better except morbidly obese people tend to die young and weight loss is often a sign of a medical issue.