Like most said, ignore it unless you're familiar enough with the field to fight the good fight. The biggest issue in that argument is that CG blends technical acumen, traditional art skills, capabilities that simply are not possible with real world medias of the past, and leaves the barn door open to the imagination. I animate, and have had this argument about creating all content etc, with others. Usually, it goes like this:

MM(mesh monkey): Not too bad of an animation....what did you model it in?
M (me): I'm not a modeler; I animated in Poser and used Vue as my render stage.
MM: (Various hoots of laughter, derogatory comments, outright sneers, etc) Well, take a look at this! I created all of this! Now -This- is CG art!
M: How long did it take you to make that?
MM: Only 6 months, fool.
M: Hm. So, in another 14 1/2 years, you'll have a whole second of footage in the can. Have fun, I have to go check on the 90 second scene I've had cooking for the past couple of days....

That is an example of exactly how easy it is to alter the argument. So many disciplines go into CG, that you can peel any one of them and strip it of any illusion of artistry. An actual mesh is a pretty clunky thing, even at best, without the shaders or textures to give it the depth, perspective, sense of scale related to surface texture. A shader without a surface to affect is nothing but an unreferenced bit of script, the only elegance perhaps a mathematical one. Without rigging, that textured mesh is nothing but a static object. Without lighting, nothing to see; with bad lighting, well.....your massive fortress might look more like a melted Cracker Jack prize. Camera work is just a matter of judging angles, after all. And so on.....

When all is said and sifted, the real test is how others react to what you've set your hands to. I've seen Bryce Balls over water get more emotional reaction than some piece of crap from Max, because the artist using the cheap program created an emotional piece from his content, where the Max worker made all the emotional impact of a just dried sock. I've had a self professed Maya 'artist' swear that Philippe Bouyer's work in Vue was done in Maya, as no $250 program (at the time) could possibly create something like that. Needless to say the Maya ahhtist wasn't exactly worthy of the Sistine Chapel......and Philippe would be the first to tell you that he was no artist.

Never call yourself an artist; let others do it.