Photoshop is a great tool in the right hands, it has been abused by photographers, in the newspaper, wire service world very little is allowed to be changed, basically what you do in a darkroom with a negative is all you are allowed to do, photographers have been fired from jobs for making changes. I spent a lot of years working in the darkroom, and got to be pretty good at it, I miss that side of photography.
Every image I shoot goes though photoshop, I don't make big changes, just a crop, re-size, minor contrast corrections if needed, pretty much same as working in a darkroom. What it has allowed me to do.........I've scanned 5000 negatives and slides since last year, preserving old sports images I've shot since the 70's, they were scratched, water damaged and now the digital files I have are perfect. I could not have done that without photoshop.
I don't know any professional photographers that don't use it.