Tbf, the problem in terms of kpop celebrities isn’t that they’re asians, but how they adhere to pretty strict beauty standards and often use cosmetic surgery for this, so they do, in fact, look pretty similar to one-another. I definitely can’t recognize any K-Pop or J-pop idol’s face, but I’ve never had this problem with any asian I’ve known irl. So maybe don’t think too deeply into it, I don’t think there’s anything wrong or racist about what you describe. Maybe try watching some asian movies with a less “spotless” aesthetic, stuff not necessarily for a young audience or where everyone is supposed to look beautiful, and see if you still have the same problem.