The near complete inability of the nations in eastern Asia to reveal what information they may have and cooperate during an urgent, life-and-death matter should temper the enthusiasm that many Westerners feel for glorious Asia — what with their high IQ levels (by global standards) and their low homicide rates.
Rather, this groping-through-the-labyrinth of an investigation should serve to revive an older description — "the inscrutable Oriental." It's all about keeping your guard up, wearing an unreadable stone face, and covering your ass / saving face above all else.
And it is not only in lending a hand that the Asian is stingy. Merely requesting help from others is seen as a sign of weakness, incompetence, "Why you so lazy?!" etc., and must only be resorted to long after it has become obvious that you're not as all-powerful and all-knowing as you'd thought. The level of hubris among Asians is astounding: no matter what the calamity, the in-over-their-heads team is bound to respond with, "Back off, man — I got this."
Why any Westerner would want to import large numbers of denizens from a black hole of trust, is beyond me. But probably boils down to them being a nerd who lives in the abstract and the hypothetical, where BRAINS + DOCILITY = MAX STATS, and having little connection with the real world, where these ghost people are among the worst neighbors and citizens you could ask for.