I'm not saying low fat is necessarily healthier than low carb. Nor am I saying we shouldn't be cutting down on sugar and processed carbs - we definitely should. But eating a low fat diet with lots of whole grains, lean protein and plenty of veg and fruit is healthy and a perfectly valid way to lose weight.
It can be yes. I don't disagree. But I wonder how much of the weightloss through this method also includes a calorie deficit? I don't know, just posing the question. I see an awful lot of diets that focus on trying to make people feel sated on 1200 calories or fewer. And a lot of people trying to embrace feeling hungry and ignoring cravings.
Eating low fat doesn't make it compulsory to eat more sugar or processed foods!
But for a lot of people who are very overweight, they cite the cravings (for crisps, chocolate, sweets, cakes, carby junk) as the issue.
If there was a way of reducing and managing those cravings for some people that would be something. Yet the NHS still solely promote the eat less move more; calories in vs calories out; low fat approach even when it clearly isn't working for some people.
As an aside, and obviously you haven't said this but lchf diets are often touted as faddy or restrictive and we are told it's not healthy to eliminate or drastically restrict any part of our diet.
Yet, restricting fat to virtually nothing and restricting calories to lower than our bodies need to function is seen as the right, healthy and virtuous choice.
I suppose my point is really that we should be looking at the reasons for this. Who is telling us this? And what is their motivation?