From a couple of days ago on HN [1], it's possible to have over 1,000 layers on Figma just to create a button [2] and over 10,000 layers on an entire website. And that's just for creating a design on Figma. Then there is the field of UX research to gather data on the design, the sense behind choosing colors and typography for UI, a familiarity with working with shadows to create a sense of depth on the page, and even working with sound and audio for feedback.
I don't even see how it's possible to hold a UI/UX position and not do anything, because there are very clear deliverables that can be asked for, and a manager can soon tell if a person isn't completing the work. It's plausible that low-skill people can exist in the field, but I genuinely can't imagine how one could stay low-skill yet keep the position.