Correction, that’s how SOME go about it. No shortage of people tracking and going by the numbers because they’ve learned their hunger signals can’t be trusted, whether fat adapted or not. Just because that a little more popular on this particular forum doesn’t mean anything.
It’s absolutely a fad and has been for years. A fad is something that’s overly / artificially popular for a period of time, which Keto absolutely has been for a while now. Just like Paleo was before it. The whole “keto’s been around for 100 yrs nonsense” doesn’t change the fact that it’s a fad right now. Also, the keto diet from 100yrs ago was a medical intervention and not what any of us are doing right now.
There is no such catch. People can do whatever they want to do.