Who said to eat a pine cone? Go ahead and build up strawmen and knock them down, I'm cool with that if you are.
What the problem is a lot of the time is people think they are eating a normal diet, and even with exercise they still get fat, so they give up on the exercise part and get fatter still.
If anyone is doing even moderate exercise and is not losing weight but would like to, the key would be to adjust the diet wouldn't it? Like I keep saying, you don't need to exercise your butt off to lose weight, sometimes sure it might be fun to get into stellar shape for some sport or to just look fantastic. Normal exercise and adjust the diet is key, in a nutshell for me this is the end of the story concerning weight loss.
I think we may not be so far off on agreeing on what people should be doing as I first thought, but we still might be disagreeing a bit here.