The times I have seen this debate get very heated is when a heavy manipulated shots wins a Photography Competition.....usually with a few hundred pounds worth of prizes.
The usual comment is "I thought this was a Photography Comp , not a Graphic Design Comp !!!!!! "
It is a hard one, as on one hand I think the PC Software is an extension of the old darkroom, but on the other hand I appreciate the experienced PhotoShopper may have an advantage over a similar skilled photographer who has no PS skills.
Final thought though............ "You can't polish a Turd"