There are many reasons for that. A obvious one is quick economic growth makes many less educated normal people can afford previously luxury tourism. But there are more profound reasons. Unfortunately, researches and studies of personality statistics of vary large group of people(for example, behavior of an ethnic group) are very difficult and most importantly: they are politically incorrect, considered harmful and forbidden, as well as the conclusions will not be accepted by public. So most people on the earth don't know the real reasons behind that but only have fake explanations that modern human mind can accept.
BTW off the topic. with same understanding, I predicted early in 2003 that Bush's goal of Iraq war would fail FOR SURE by observation of similarity of statistical (i.e. population) mindsets between middle east people and Chinese people.
The good news is things are changing slowly towards the good direction. The habit and behavior of Chinese people, especially young generation and educated people are more and more closer to that of Japanese, Hongkonger, Taiwan people. But it will take long long time, maybe generations.