Because some views are not so much independent and clear headed as thought to be the views of independent and clear headed people, and many kids adopt them not through their own understanding but by copying what they think seems cooler.
Naturally our conservative brethren(including myself) consider some of those views to be short sighted, and based more on BS but nice sounding ideals rather than actual reality.
Having worked for various large companies in the US, I have realized one thing, I think I understand why our economy isn't as strong as it should be. Unlike strong japanese companies for example, the large companies here in the US are often very inefficient. There are tried and true methods, methods that improve work and profit, except that most people will just start whatever system they want, even when the knowledge for better systems exists. Thus countless businesses fail, and even those that do succeed because in some ways they are really good, still have places where they lack greatly.
Its good to think new things, but what has worked for generations hasn't suddenly stopped working because some new kids were born who think that they know better than those who came before them... You build and improve on what is there, not just do whatever you want.