The photographer might not hang around if not dressed properly. Let's get abstract. Actors have to fight for it, but they grow into more mature roles. Photojournalism history and general history is essential. Without history, you work the same old territory without adding new understanding.
Photojournalists are spotty on history, their history and general history.
We know W. Eugene Smith created some great photojournalism. Essential is a funny concept. You get along without something, but it soon becomes essential with use. The same thing applies to history. History is shown as a horizontal line, leading up to now.