"While photography is the easiest medium in which to be confident it is the hardest medium in which to have a distinct personal vision" Chuck Close
Let me explain:
Photography is the easiest form of art of mimesis "the copy of reality". And is the copy of reality on which people are usually more attract of. And is the copy of reality most people will pre judge as good quality creation.
But when trying to do something else a part from mimesis photography can be even more challenging than other form of art. Because it quite completely copy of reality, especially now a days with digital technology that most people don't even need to craft their work in order to have a image ready to print, so most people with a camera will be confident that they are doing a good photo as soon as they can see a good image quality (not good art) in their LCD screen.
It means, if you want to go beyond mimesis you will better served though painting, sculpture, etc since for abstract creation they are easier than photography. It also means that to self expression photography may be more difficult because you have to work with real things that you photograph instead of create from the imaginary. And that's why photography is the hardest medium to have a distinct personal vision.
You don't need much skills to press a button on the automatic camera or to throw paintings or mixing colour on canvas, or even to create shapes in sculpture, as far you can do it with good composition, harmony or even message, etc. But photography and other medias can demand more skills and craft if you want to make something else.
Try to do a platinum print with a view camera and tell me if it is easy.
If you ask a child if painting is easy they will tell that it is very easy because they feel confident doing so. Until they grow up while being told that the good stuff looks like tangible things or reality.