If youre gorging on fats past your defecit intake your not going to lose shit. It's a high fat lowcarb diet, but the fat your wanting your body to use is the stuff already on you not a pound of cheese or butter. The diet does work at reducing appetite and therefore calorie intake.I think the problem is people on Keto aren't necessarily addressing other eating disorders etc;. "Oh I can't have bread but let me eat a pound of cheese, 3 steaks, and some bacon to feel full".
Also, the diet should only be for individuals who's bodies don't regulate insulin properly. Not this huge crash/fad diet where people are using it as a shortcut to drop pounds quickly.
I also don't consider this a fad diet. It's been around for a long time now. It's just picked up in mainstream appeal more recently.