The creative professional IS a target for replacement. What LLMs do best is specifically what the "creative professional" does. Better than coding or mathematics, LLMs excel at creative English text. This is because creative output is trivial when compared with technical skills.
I don't think the "creative professional" will get replaced though. Because usually the task is so trivial that positions like these largely only exist because of politics. You convince people around you and yourself that your "creativity" has no peer.
It amounts to this: I want a photo-realistic animation of a cowboy with blue skin with a laser cannon riding a unicycle through the grand canyon with a dwarf chasing him. <<This sentence is trivial to come up with, ANYONE can come up with thousands a variations and tweak the sentence in various ways. No special talent needed here.
A creative director simply comes up with high level instructions (like the one above) THEN the ultra hard part is making that high level instruction a reality. That is HARD and as of now it looks like both skills are being replaced by AI.
But like I said, the directors' position is in actuality largely political. Thus his position is safe even though the actuality of what he does is EASY and therefore a prime target for replacement.