Photoshop a shortcut? BS! plain and simple.
first off in my job if I decided to switch to oils, my boss would be really pissed. I couldn't imagine painting skins on canvas, scanning them, then making them fit to UVW's. My freelance stuff it only makes sense to me to paint them digitally and send the file straight over to my art director through FTP. No mail, no insurance etc, etc. and any changes that need to be made can be handeled with a simple email.
I never had much traditional painting experience (unless you count airbrushing on Harleys). But I approach painting digitally the way a traditional painter would approach a canvas. more or less.
I think the biggest downfall to painting digitally is there is no original piece. That is whay I almost always start with pencils then scan them in and paint them. It brings it down to earth, if you will. Plus my A.D.'s most always want to see b/w art before adding color.
My feeling is that whoever is telling you this, does not have the full scoop on what is going on in the outside world and have a closed mind.
There was much rejoicing in the realm of the Harvest Gods when man created the beer, light could not penetrate.