I think you are drastically underestimating both the density and the scale and overestimating how much "Westerners" are propping up or otherwise essential for it's function, sure there are lots of Westerner entrepreneurs there (myself included at one point) but the reality is both Mainland and HK entrepreneurs not only drastically outnumber us but they were also the ones kicking most of the home runs and might I say the braver more creative ones (contrary to Western harbored stereotypes).

I recommend you go and see for yourself. It's really something that is very difficult to comprehend until you see it in person.