Post processing suffers the stigma of being a corrective agent, and while it can certainly serve this purpose, it is also a means of enhancement, and in some ways, it can be the most creative aspect of the whole photographic process.
Even if you shoot JPEG, a form of post processing is occurring; in terms of photographic "pureness," there is no philosophical difference between setting sharpness or saturation in camera before the shot or on the computer after the shot…manipulation has occurred in both instances.
I understand the mentality: My first digital camera was a G3 (still a great camera), and I had read that RAW was best. So I shot in RAW. However, I noticed that my photos actually looked softer than the JPEG shots (at this time, the concept of RAW was as foreign as the meaning of f-stop or ISO, absolutely clueless on all levels). Yet, I felt as though I would be 'cheating' if I used software to sharpen up the RAW files. Actually, it would be a couple more years (fortunately prior to buying a DSLR) before I learned that RAW files generally require post processing; and then I learned about Ansel Adams' work in the darkroom, and the importance of post processing in general when working with black and white.
Anyway, if considerable post processing is used to make a photo look great; the appropriate response should be, "so what?" A great shot is a great shot irrespective of the means used to achieve its qualities.
Yes, there are some photographers who admit to lazily relying on post processing to cover up mistakes that could have been avoided during the shoot, and if one wants to criticize this approach, that's fine. However, post processing has been an integral aspect of photography since its inception (digital simplified the mechanics, but it did not necessarily invent them)---it is a tool like any other photographic tool, and its use will vary depending on the demands of style.
But if one likes a photo, and they find themselves saying, well yes, it's a great photo, but only because of the post processing, as if to self-consolingly devalue the actual quality of the photograph, then this person needs to shelve all jealousies and study up on the history of photography and direct their energies towards improving their post processing skills.