Tiny point: "It was all bullshit: no one looks like that without calorie restriction." I'm 6' and I've weighted 135-145 pounds for my entire adult life and I'm 50+. Being a guy, I never restricted my calorie intake. I'd expect there are women with a similar metabolism. Which isn't to say that a lot of skinny celebrities aren't dieting like mad to get this look. But probably some percentage aren't and the rest hate th…
I don't think you're contradicting the article. You're simply "naturally" eating a low enough amount of calories to keep the same weight, relative to how many calories you expend in exercise/regular life.
At the end of the day, if you were eating more than maintenance calories for your metabolism, over time, you'd be gaining weight.