Agreed on all counts. It's clear that a low-carb diet is the only thing that works for some people, while others (like me) have no trouble losing weight on a low-fat or simply an "eat a little of everything and not too much of anything" diet. And I think that those different responses probably boil down mostly to genetics.
There are also different responses to exercise: most people can't lose weight through exercise without also changing their diet, but some people can. Again, it's probably due to genetics.
The problem is that these genetic differences run across the population, so you get millions of people who can only lose weight on a low-carb diet, so they tend to unversalize it and say that low carb is the best way for anyone to lose weight when in fact it's not true. It's the best way for people like them to lose weight.
You can find lots of people who've lost weight successfully (and kept it off) on low-fat diets, on low-carb diets, on Primal diets, on just about any diet you can think of. I think the best approach is to experiment and find out what works best for you, keeping in mind that to be sustainable any diet needs to provide you with a balance of nutrients, fiber, and other essentials. That cuts out many of the fad diets that eliminate entire food groups: they're great for losing a lot of weight quickly, but you probably can't live on them for 50 years without serious side effects.
I agree with you as well. It's unfortunate that nothing really works for someone like my guy. He's tried low calorie. He's tried vegetarian. He's tried low carbohydrate, which is the only one that has sort of worked. But once he resumes "normal eating" habits, meaning he introduces something like pasta back in his diet, the weight goes back on his body. It's kind of frustrating to think that because of your genes, there is really nothing you can do. If I wrote down what the guy eats on a daily basis and his exercise routine, people would probably not believe he is "medically obese" because his diet is so meager, in my opinion.
Unfortunately, since my last post, my husband has lost very little weight on Atkin's thus far and it has been almost a month. He is not even near the weight where he usually stabilizes on Atkin's so it's pretty disappointing. He's going to keep at it, since he has more patience and determination than anyone I know, but I know he is very, very disappointed. The guy has not eaten a SINGLE SNACK (aside from pork rinds because they are zero carbs) in about a month. Crossing my fingers for him!