Well, maybe that even makes it easier to remember facial features :)
IDK man, you might have a point. Even though criminologists discuss if things like composite sketches are not as precise and practical as they thought. Your memories are mostly inaccurate, especially after a long time. I just don't think that your theory has any value because someone would have pointed that out scientifically by now. We would also know that they have higher crime rates and fewer solved crimes by far than non-Asian countries.
I don't call you a racist. I'm just saying that the thought you had was racist. That doesn't make you a Nazi, we all have racist thoughts from time to time. And for different reasons, in most cases it is ignorance and in yours, it's curiosity without thinking it through.