I'm sure painters and pen and paper artists have said that digital artists are not really artists because they let the computer do all the work.

Yep and I've experienced that more than once when trying to get work into local gallerys.

Yet I frequently see paintings in these places where the artist has clearly drawn over a photo. or photos that scream bad photoshop filter.

I reckon it's because as mckenzie rightly comments about status and they don't like  anyone to get into their space or steal their glory.

Personally I think thats a silly approach to take, by sharing and discussing techniques and ideas we all learn more as artists.

Pinky - you left the lens cap of your mind on again.