Interesting thread.
I went through very similar sounding arguments in the 90s regarding the authenticity and integrity of music production with the move to a full digital workflow.
Many of the anti-digital proponents back then failed to understand that many of the 'new' digital studios were in fact the same old studios. Full of the same people, carrying out the same creative processes, exercising the same aesthetic judgment and manipulating/processing the material in much the same ways as they were when they had been analogue studios. They were just using a different toolkit to do the same jobs more quickly, with greater flexibility and with less degradation of the source.
There was of course an elitist subset who didn't like the transition to digital simply because it meant anyone could acquire the technology for relatively little money and have a go. Music production was no longer the preserve of highly experienced engineers with rooms full of very expensive, often esoteric and occasionally bespoke analogue kit that they had built for themselves. Though an equal number of the anti-digital proponents were, oddly enough, newcomers to the discipline who had a rose tinted nostalgia for an analogue world they didn't really understand or have any experience of.
I'm probably barking up completely the wrong tree but I do wonder if there isn't a similar issue with PP in contemporary photography and that one of the drivers behind the discomfort around digital PP is a misconception of the differences between the digital and the analogue.
Digital is all about bits and bytes, computers and software, it's easy and accessible and anyone can do it; as a result the end product has little value unless you deny yourself use of the very tools that made it possible for everyone to join in and enjoy creating images. On the other hand analogue was pure and simple; all you needed was a camera, some film, a bit of light, and some developing fluid.
As a result 'real' (or analogue) photography is all about the long and painfully acquired artistry with which the camera is deployed, where digital is just playing with software.
Of course this (over-simplified and possibly misconstrued) view does rely on forgetting (or possibly never having understood) how much PP occurred in the developing phase. As others have pointed out a certain Mr. Adams spent more time in the darkroom than most of us spend on digital PP, as an artist and visionary I suspect he would have loved some digital backs for his cameras and copy of Photoshop.