I‘ve done Keto for over a year now and it’s great. It suits my body very well, and I lost 20kg in the first 8 months and have kept it off.
saying you can eat 4000 calories and lose weight on Keto is wrong (unless you are doing mega exercise) - that’s not how it works! It works by stopping you feeling hungry so you don’t have to eat as much, so you restrict calories automatically.
I have Labrador genes so I was always hungry. And I really always was. As a 176cm woman I weighed between 100 and 120kg at different times. Because when I felt hungry I needed to eat.
Now eating the Keto diet I have no breakfast (not hungry, saves time). I eat lunch at 13:00 and dinner at 19:00 and nothing in between - I don’t need to. My calories intake has reduced a lot but I don’t notice that at all as I am not hungry. I eat lots of lovely meat with creamy sauces, cheese, olives, nuts. The food is very tasty (although if I were a vegetarian I think it would be a lot trickier).
keto works FOR ME as it suits my body type and I find it easy to follow. It is not the right choice for other people. I feel healthier on Keto than I ever have before, and I am still slowly losing weight although being much laxer about what I eat (I have more carbs per day, probably 50-80g). To have lost weight over the year and not put it back on is very novel!
For some people it can be a really good option, so worth looking into. For others it will not suit.