How do Asians lose weight and become thin without a high protein diet?

I feel like America has a heavy emphasis on protein when it comes to losing weight. I understand that it’s the building block for muscle growth and muscle is important for metabolism. When I watch YouTube videos of Korean diets or see it firsthand when my Asian mom/aunts diet, they emphasize more veggies/fruits and not protein. The slim Asian figure is something I prefer over muscle mommy but are these Asians at a disadvantage in the long run if they achieve that body through a low protein diet? Is it possible to become slim without that heavy emphasis on protein? (Obviously not ED skinny like some kpop idols)

There’s no need to downvote. I’m literally just seeking advice like damn yall my bad for being a dumb fuck guess I should keep quiet and never learn