I couldn't agree more with Colin, what you call things IS important and using inaccurate or 'dumbed down' language just adds extra layers of misunderstanding.
On the subject of software I would have to say that I'm not a big fan of Photoshop, or any Adobe software apart from InDesign, though that's really just an evolution of Aldus PageMaker which was the best free-form page layout application of its time.
However, I have worked in pre-press on and off since the early days of digital imaging (doing stuff such as producing halftoned separations of digital images for offset litho) and I've yet to work in or with a pre-press shop that uses anything other than Photoshop. So if you want to move into photo and image processing in a commercial print setting it's worth bearing in mind that you will need to be familiar with the idiosyncrasies of the latest version of Photoshop in order to demonstrate that you can maintain a commercially relevant skill set.