I once worked at a startup where the CEO was originally a designer. He once spent two days huddled with the main designer for the product, trying to pick exactly the right font for the product. I have no idea how you'd have that kind of discussion with an LLM.
But then, I would not spend more than five minutes on this decision, so I'm probably the wrong audience for this ;)
Used to work in a designer-heavy company doing frontend work, one of the founders could spot by naked eye if you got the alignment of something wrong by 2-3 pixels during the reviews.
The UI and UX of the product was amazing, and took some time to get used to actually delivering pixel-perfect designs across three different browsers, but fun times regardless :) Probably takes a certain individual to enjoy that sort of experience though.