Perhaps a better way to explain my meaning would be to consider the difference between model photography and street photography.
Both have their place; both have their purpose.
Models standing under staged light, with carefully-chosen clothes, assuming carefully-choreographed stances, and feigning various facial expressions may have definite commercial application ... but can this appropriately be labeled "street photography?"
The entire essence of "street photography" is to capture the
un-self-conscious expressions and
un-self-aware body postures of the human condition, and a search for this kind of "human authenticity" has become a genre of photography unto itself.
The existence of "street photography" does not negate the value and worth of model photography, but by the same token you cannot properly call "model photography" authentic street photography either. (It's posed/staged photography, the very antithesis of street photography.)
This is the essence of what I'm saying the difference between actual
nature photography and staged/posed/manipulated photography of wild subjects.
Me taking my pet parrot out, with his clipped wings, and arranging him on a perch outside, with foliage behind him, baiting him with food to stand "just so," cannot in any way be called
nature photography.
It's a studio shot of the bird in my backyard and should not be held in the same regard as an authentic wild parrot photograph actually taken in the Amazon rain forest its natural environment.
To revisit the analogy: the former is a "model" shot; the latter is a "street shot" (albeit in nature).
As mentioned in the beginning, the boundaries of raw art are limitless, and don't require anyone's explanation.
But when you begin to categorize kinds of art, there have to be some definitions.
Again, in order to call something an authentic "street shot," there are certain criteria which have to apply, boundaries as to what qualifies as a street shot or not.
Me assuming my best, most fully self-satisfied smile "for the camera" is not a street shot ... but if someone in the room (unbeknownst to me) happened to capture my facial expression, in a moment of authentic happiness upon the arrival of an old friend I hadn't seen in years, that genuine expression of joy could properly be called a street shot.
It's the difference between "making up" art and
finding "art" in reality.
This is the difference I'm trying to articulate; sorry if it is causing confusion.