I'm glad I've bumped into your article. I've heard of this keto madness myself, one of my friends is doing it and he's also doing a whole media circus out of it, posting videos all the time. Last I've seen he was telling people how great it is to eat chocolate for lunch and still losing weight.
I'm a bit like you, have never been overweight and have never been on a diet. My strategy is to keep the ballance. But I also think those who can't stop eating (like my friend who's 174 kg again) need a therapist who would help them figure out the cause that makes them eat more and more. Rewarding yourself with food is not a very good idea and treating your fear with food isn't either. Having a balanced nutrition is in the other hand. Just my two cents.