Because this is 2 1 century, different times, different life rules, too many new things, people are overwhelmed.

Moreover, now is the information age, and the speed of information dissemination is not the same as that in ancient times. In ancient times, some things took n years to know, but now, stop it, the speed is completely incomparable.

Therefore, there are many reasons, and it is not clear in a few words.

Because today's people: outlook on life, world outlook and values are different!