Because a photograph is created through a chemical process that the photographer has only a limited control over, it would seem that the photographer is somewhat removed from the creative process. Many artists resisted accepting photography because they felt threatened by what they did not understand. This is no doubt one of the main reasons that digital art has received so much resistance both from within the art community and from the general public. It threatens their expertise. I feel that they stand the test of time a lot more.
Computer art seems less permanent, less thrilling.
I'm not saying it's easy to create, it takes a lot of talent and skill . . . I never feel fully in touch with my computer art. It's a disembodied tool with preset functions that you customize and make your own. But it's not a painting. I see a lot of wonderful digital art there.