Care to elaborate on why you think this way? What happens when a "top" cinematographer shoots a TV pilot, or a high end commercial? Is he now not a cinematographer?
Exactly, his title relates to the project, however a person has the right to label themselves as a Cinematographer but only if they have shot something in the 'top' (I do not relate this to budget or gravitas)form of the visual arts - Cinema. Some title/honor has to be reserved for this. Short Films with this in mind included.
But also the role encompasses a tight visual collaboration between costume and production designers, also maintaining a style of shooting with the Director whilst lighting (the crux). He is the artistic chief of the technicians, who the director relies on to help get his vision on screen. If the Director doesn't know the answer the Cinematrographer should. (yes DP's do the same)
Right this could be the 'pompos' bit, I feel Cinematrograher has to be someone who is able to work with film, but not necessarily uses it at every given moment, but atleast as experience. Film or exposing a latent image is the greatest test for any photographer (Ansel Adams would agree), once you set that stop you have to know without actually seeing what is on that negative for the perfect exposure. For me this is photography. We are moving away from the art in this digital age.
However if A Cinematographer works on for example: a outside boardcast, he is a Lighting Camerman (he hasn't lost his above status) for that project. It would be ridiculous for him to be credited as Cinematographer.
Here come the tricky part for my argument!,
I feel those who shot the Dekalog and Band of Brothers were Cinematographers for that project, although made for TV. I could argue that they are both 10 hour features, but thats a whole new discussion!