Documentary and honest film photographs are not manipulation. They are the biggest truth human ever investigated. Different view point make truth from different view points and they can represent one 3D object in different way and all can be truth, as 3+1=4 and also 6-2=4 both are truth.
What is manipulation is how we use photograph and what we see and what we want other to see in them. This is not manipulated photograph this is manipulation WITH photograph.
If someting is manipulated, away from truth, it is a lie. So all of you that beleive all photograph are manipulated are just liers for it is you practice.
Or lets redifine what is a meaning of "manipulation".