The point regarding why as a part of a minority I feel like Hollywood should go out of their way, yada, is the very essence behind the complaints in the article. It's not because Hollywood isn't casting Asians left and right everywhere (Hey, if that we're the case, we'd be pretty happy), but that there were opportunities to cast them in roles that fit their descriptions perfectly and it was passed on; all of this within the context of the already preexisting underrepresentation. That's the genesis of this entire debate in the first place.
And it does irks me in other cases too, the most recent example being the casting of Jackson as Nick Fury in Iron Man. I can't particularly find a meme pic confusing enough to express my sentiments regarding that one. A counterpoint to that would be the casting of Michael Clark Duncan as Kingpin; I can see how finding a beetter fit would be hard, especially since I don't recall ever seeing a white actor with his physique.
I do sympathize with the Asian perspective a little more, three-guess as to why. And though I'm not one of these letter-writers types or even much of an activist, I do get a little irritated at the whole underrepresentation problem as a whole. I'd like nothing better for representation to be even and more accurate in Hollywood, period. If that were in place, I'd hope that people would be less nitpicky about specific instances x-race actors being cast into y-race character roles.