No one here ever said that painting and photography was the same thing. I'm not really sure why you think people using Photoshop are "painting" their photos. The program isn't called PAINTshop (I mean, that program does exist, but for this conversation we are talking about Lightroom and Photoshop, and the differences).
If I go to the beach and want a portrait of my kids with a sweeping sunset, I can't very well clear out the other 20-100 people there just so I can get a photo. I can strategically place my kids not near others, then clone out everyone later. I also might find a pretty alley of flowers somewhere, but on the other side is an ugly building. Flipping and cloning to the other side in post fixes that. It isn't painting. It's having a vision while taking a photo of what I want the end result to be, and then having the necessary post processing skills to acheive that vision. Not every location is a dream. yes, sometimes I do shoot things exactly as they are, but with not-in-studio portrait photography in particular, there are often things you simply can't control in camera, but take about 14 seconds to fix in post. I'm very active in some photo forums with working professionals - not just "pros" but people sponsored by Nikon, Canon, Sony, Profoto......these people ALL edit their photos in PS. They don't just stick to LR.
Times have moved on from old school darkrooms, and while many people are going back to film, that doesn't mean using PS is bad, or wrong, or silly, or amateur.
This fullfills painting fully. You are changing the reality the photo displayed by creating a painting that fits your "vision".
And I stand by it: a *photographer* who need Photoshop is bad as the corrections in the raw developer are more then enought to correct small errors while taking the photo. If you want to create paintings or collages you need something like Photoshop but you are no photographer - you are a painter...