I think the implication is that if you take away the AI tools, the AI bros can no longer make art. Whereas a "real artist" can make art from just about anything.
I've also seen people write that AI "democratizes art" and "makes art more accessible", when making art is literally the most accessible human activity besides breathing.
AI bros have a real penchant for making artists out to be some cult of ivory tower elitists and that AI is the Great Equalizer knocking them off their high horses and giving them access to the good old boys club or whatever.