Structure is needed to accomplish something. You're thoroughly missing my point, let me try an analogy:

I am going to gather 100 fools, and ask each, what they imagine life on mars must be like. I am then going to structure their opinions, write them down in books, and so on.

Replace 'life on mars' with 'human nature'. I fail to see the difference between my example and the presented article.

Now if someone were to go study physics, invent a rocket, get into the rocket, fly to Mars, and have the ability to report back their findings - that'd be discovering life on mars.

I'd listen to his/her take on life on mars with great interest. I'd call that a scientist with an informed opinion.