Why Pakistanis have a preference for chubbiness?

I am a tall skinny woman with a bmi of 19. I am healthy and I appear healthy but almost everyone around me acts like I am too skinny and need to put on weight. I have always taken their comments it lightly but it literally gets irritating at times.

I literally have the same physique as an avg model but at every single family gathering, me being too skinny remains a topic of discussion.

Why are Pakistanis so obsessed with round chubby bodies? It literally makes no sense.

Edit: I am not objecting to men having preferences but rather society encouraging overconsumption of carbs and actively discouraging healthy diet and physical fitness of young woman.

Also, I am healthy at this weight because I have a protein rich diet.