It is, of course, a requirement that you have a calorie deficit to reduce weight.
You can do that by restricting calories but the body fights back by lowering metabolism so, after a while, there is an inevitable weight gain (and more) and this happens every day all over the world (i.e. hard to refute).
You can also get a deficit by going keto - less calories come in because natural satiety signals lower food intake and lengthen non-eating intervals naturally (keeping insulin low and allowing the burning of body fat). Weight loss can be accelerated once fat adapted by lowering fat intake periodically or fasting - letting the body focus on burning even more body fat.
Keto is not just for weight loss though - people eating most calorie restricted diets out there might not benefit nearly as much as someone on keto when it comes to reversing type 2 diabetes or improving their blood markers in general.
Finally, yes, I agree that it is possible to be on keto and plateau at 50 or 100 pounds above where your body weight should be (but “I have good blood numbers” you’ll say).
This could happen because of a combination of the “eat fat to satiety” mantra and being a good cook. My feeling is that, to get satiety signals right, you have to get bored with food and it has to become a little more difficult than a microwave away.
Think about it, tens of thousands of years ago when people asked what’s on the menu, they got 2 answers:
- Buffalo
- Buffalo you need to go and kill
Both will not encourage over eating (palate fatigue and hunting in dangerous).
Now, fat bombs, BPCs, highly palatable foods, exotic meats and fats a supermarket trip away, enjoying cooking with others, keeping a reputation as a good cook intact etc. can easily leave someone on keto at a much higher weight than they really desire.
Instead, eat only eggs, bacon and olive oil covered or sautéed leafy greens - all lightly spiced (get your salt by mixing it with water) and let boredom set in. Cook fresh every time and then do the dishes (to make it a bit of work - if it is late enough and you might put off to tomorrow). Weight will fly off.