Different people have different tastes about how much they are willing to touch up photos in software. Some people are more fond of getting everything right in the camera, and not touching the photo up at all. Others like to edit the hell out of their photos until they look nothing like the original. It's really up to the individual artist's taste. Also, depending on what business you're in, post-processing could be looked down upon or regarded as just another required step in the workflow. For example, in the photojournalism industry, especially when it comes to newspapers and the like, it is viewed as a very bad thing to alter the content of an image in any way apart from small things like levels and curves. On the other hand, fashion photographers often use photoshop to remove blemishes on models and touch up other imperfections. So, depending on who you talk to, photoshop may or may not be standard. But it's definitely not standard for everyone.