Another point to take into consideration is that in
Digital photography the PP begins by fitting the lens selected for the job, then settings on the camera like WB, Tonalities, saturation, and many more on camera possibilities.
Not to mention if the photographer is
using filters on the lens.
This leaves the argument of not using PP to make the competition even more redundant; the PP is already done and continued by taking or saving the image as a JPG.
If the photographer take the shots in RAW and use ACR then here is another PP because ACR ignores the camera settings, the image should be downloaded using Nikon NX

Further more the same photographer taking a shot of the same spot using 3 different brands of cameras at the same time will produce 3 different images because the “in camera PP”
A common or “Traditional Work Flow” used by nature photographers like Tim Grey will be as follow:
1) Select image and establish game plan
2) Optimize in ACR or similar software by adjusting the slides in a conservative way and do a “gross crop”.
2) Open image in PS or similar software
3) Duplicate layer(or use smart filters) and Apply Shadows/Highlights.
4) Gross crop and rotate if needed.
5) Clean remaining image.
6) Tonal adjustments, first global and then localized.
7) Apply filters including noise reduction.
8) Final crop, merge layers and save master file.
Then for the web:
Resize for web, convert to 8 bit, change color space.
Sharpen the image.
Save as jpg.
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