I would believe it I spent a great deal of time in Design courses specifically related to UI, and for my final project I was tasked with creating a program mockup for an inventory management system for the local lumber mill and after that it was programming for property management systems and the UI's out there are god awful and to this day many still use the same ones they had back when they were hosted on NT4.That's probably more realistic. Right now, design work is time consuming. Not difficult mind you, time consuming. And there already are AIs that can convert UIs from one platform to another. I think a lot of people would be surprised at how many professional developers can't even create something harder than the simplest GUI, let alone something that has lists, tables, charts, draggable windows, etc.
And to be honest, some of it's not exactly intuitive, which leads to a lot more mistakes. And this is stuff where an AI can shine, though it will push out quite a few developers.