Because it can do specific things faster, better, and cheaper. Particularly in pre-visualization, where generation of full assets before client approval of concept would be fucking stupid.
No, categorize those two working professionals, an illustrator and a writer, with a commonly understood term that doesn't include other white-collar professionals.
Stan, an illustrator, who harbors anxiety that a new technology will render his hard-honed skills obsolete, works at a firm with secretarial staff, project managers, account managers, and various other white collar workers.