Public Transportation

Riding the public transportation in Beijing has made me realize two things: one, that China has some serious problems with metropolis overpopulation and two, that I really don't want to do this anymore. Especially not between 5:30 and 7:30 pm where everyone is literally pushing you as far as they can so you can all be stuffed in like sardines. Bad me, I forgot to never take public transportation in those two hours and it cost me some of my sanity. Being an American and brought up in America, I need some space. Maybe no privacy is why people are happier in come countries, but this is not privacy. This is just... so the new question now is, why do the Chinese push and shove their way to sacrificing comfort (which they are complaining about the whole way) just so they can get on the bus/train?