That line is as wide as you want - it is different for different people at different parts of their photography timeline. That line is also legally blind and shifts like sand in the wind.

for me, art can be SOOC or dragged around the PP block - at the end of the day its the end result and the vision of the photographer that should be judged. imo, when it comes to really good images the PP only equates to 15% of the end result.