Kung Pao Chicken is sweet and sour, and foreigners prefer it. Secondly, it should be said that our Chinese chefs have highly restored this dish abroad, allowing foreigners to enjoy the charm of Chinese food.
Of course, there is also the fact that they have never eaten other Chinese food.
This is just like how we think steak is the most delicious Western food.
If they could eat authentic hot pot, braised pork, and steamed pork buns abroad... would they still say that their favorite food is Kung Pao Chicken?