My favourite ranty subject. I find myself agreeing with Yello here again
Sorry Yello, death by association for you once more I'm afraid.
The human body is complex. I doubt anyone would dispute that. Not all foods, be they rich in carbs, protein or fat, are the same. Everyone is different, every food is different. You can be a high level ultra endurance athlete fueling yourself on animal fats over carbs with plenty of fresh veg (I know one who does this personally and he knows more who do), carbs or some other choice. Scott User10571 was a vegan and a winner of the Badwater ultra marathon. Not sure how he did that but I'm no expert.
What is clear is that just going low fat isn't working for a lot of people and is not the only way to lose weight. The devil is in the detail also. How do you go low fat? How do you go low carb? Government health advice does not move other than to further reduce "fat". What is fat? How is it made? How does your body process it? What is cholesterol? How does being physically active affect this?
Your friend here is knowledge. Read up on the endocrine system and get your information from multiple sources as not to get a one sided view of things. There is a lot of information freely available on how hormones rule the body, including fat storage. A little knowledge really can help you make a more informed food choice. All you have to do is experiment on yourself when you have knowledge.. I'm still lean after changing how I eat. I never measure food, calories etc. I eat a shed load of leafy greens as well as other fresh veggies and fruit. I don't worry about animal fats from fresh food and fish. Within limits of course. We've started buying outdoor reared grass fed meat locally. More expensive but we've cut back on other things. It's no effort to keep the weight off when you find something that works for you personally and it agrees with you. I have found something that works for me. What I do might not work for you but I have no reason to change and what I eat would seem to be healthy.
Reducing carbs does not mean Aktins in the same way reducing fat does not mean you are following weight watchers.