Agreed. But obese people need to understand the basics first (EAT LESS!) and then they can tweak their diets to make them more comfortable with fewer calories.

I find the exact opposite to be most effective with myself and the others I have seen in groups around me. Eat food that is nutrient dense and filling and take out empty carbs and you can succeed at eating less a whole lot easier. And that is when people who have been overweight for a long time succeed in the long term.

If it was really that simple, don't you think people would already do it? Your advice comes across as pretty sanctimonious. It's the equivalent of shouting at heroin addicts "STOP TAKING HEROIN!"

Heroin addicts don't usually go around saying that they're just as healthy and beautiful as non-addicts. And they don't promote Heroin Addiction in schools.

I think keto diets have been in most cases successful precisely because they not rely on understanding and self control, the body simply adjusts and starts feeling full faster.

It's not "feeling full faster" per se; it's more about the fact that being in ketosis has a demonstrated natural appetite-suppressing effect.