My brother, 21 yo, is like this. He’s ~180 cm tall and has never weighted more than 61 kg (during the 2020 covid lockdown, he made a big deal out of this since it was the first time he passed the 60 kg mark; after the lockdown was over he immediately dropped back to his perpetual weight of ~55kg). I live with him so I know his eating habits: he eats all the time, whatever he wants, whenever, how much he wants and simply doesn’t put on any weight. Is very energetic, no sick look / demeanour. It’s just fascinating to me cause I’m not like that at all, I have to watch what / how much / when I eat.
Reading past the headline, the article goes on to say that calorie in/out is correct but hard to calculate usefully and thus they recommend strategies that are easier to keep stable.
It’s pretty shitty to equate a first worlder feeling hungry for a bit to actual starvation. One is unpleasant. The other is serious.
reading past the mansplainer explaining the headline to me, what it actually says is that calorie counting can be more harmful than good (which is a very mild take and an under-estimation)