Photography is not just using a camera, it is looking at the world with your eyes wide open and analysing the meanings behind the subjects in your view. You don't know the meanings, you just create them in your own mind. You feel free to think of your own ideas, you don't need to fit in with anyone's expectations, because that's what we're used to, right? One person has a view on something, tells the other person what they think, that person will then tell others and it becomes a usual expectation from everyone.