Yes! Fat by itself isn’t unhealthy.
The best example is Italy, it has the lowest obesity rate of Europe, (1) but also has the highest consumption of cooking oil of Europe (2)
I was surprised in Italy when I saw how much olive oil they used while cooking. For me oil was just like a cooking aid so stuff does not stick to the pan, in Italian cuisine olive oil is not just an aid, it’s part of the ingredients














BMI isn’t perfect but it’s still a good tool to compare two large, similar populations.
And no, being morbidly obese is not healthy.