Just be curious, how do you know that generalization? Just attended an MIT c-function yesterday. I found all students are extremely happy there and most importantly, they're very confident in what they are doing. Yet, by your standards, they should be very upset. BTW, at C-level in millions of fortune-500000-esques, nearly all are guys like you said "他(她)们生活的并不快乐!对知识、科技的进步并没有真正的兴趣!" In other words, more than 80% of total global economy is controlled by you-said unhappy guys, even in those enterprises whose wealth was accumulated by you-said happy guys like Warren Buffett across the earth. And I also found Tsinghuaees are governing the Chinese government at the very high levels: president, governors, and the like. And nearly all McKinseyees are you-said unhappy guys who are actually issuing advices to millions of CEO’s around the world on a daily basis. Nearly All PE/VC shops on Wall Street were founded by HBSee-likes. American President graduated from Yale and HBS. Chinese President now seems to be from Tsinghua. Just name a few from a statistical angle.
When most common people can't reach others' success highness, the typical stances they pick is to "sort of envy", more or less, especially using word of mouth. Statistically, I found "the higher a person's past achievements, the higher his/her future accomplishments" and Mavericks like Bill Gates only account for a few, very insignificant in statistical sense. Even so, Bill Gates also emerged from Harvard University and his company hired tens of thousands of you-said unhappy guys: MBA grads, marketing experts, Ph.D's, top college graduates and the like.
I don't want to deny a fact that some guys with past huge achievements go downhill form time to time, but if you want to generalize a point of view, the best way is to use statistical data to substantiate it: the enough sampling issue. Have you taken a GMAT test? I just wonder, it's a basic logical thought that GMAT must test you and you should have in your mind.
Let kids have their own dreams rather than their parents. It is the time for us to take a serious look at our own education system and its value system. The education plays too much importance on the grades, too less on creaitivity.