I've heard my Asian friends make similar remarks about a lack of Asians in Hollywood. I see it as mainly a consequence of the fact that A. they don't traditionally view acting as a noble or lucrative career path and B. they only make up a small percentage of the population (4.5%)
I don't think it's that simple. Notice how there are arguably more Asian women in the media (newscasts, roles in movies, fashion shows) than Asian men. I don't think there is a lack of men who want to go into it, I think it's just a lack of demand.