Developing a "voice" is done, at least partially, via honing one's craft, as well as engaging with art made by other people and cultures. The former is antithetical to prompting, and the latter is actively being destroyed by AI.
I can't help but feel that this strange insistence by industry that AI be used to all but usurp art ultimately comes from a place of jealousy, and/or due to the fact that some intelligent-to-Americans-sounding British voice saying something like "we're operating at the intersection of art and technology..." at some TedX talk causes VCs to turn out their wallets.