The one thing "AI" actually does well enough for me is writing CSS. It's actually the only thing I trust it with, because there is very little consequence to trusting the output when it writes CSS.

I have a designer on my team that adds their polish to the basic HTML and CSS I produce, but first I have to produce it. I really don't care what the front-end ends up looking like, that's for someone else to worry about. So I let the "AI" write the CSS for buttons and other UI elements, which it is good enough at to save me time. Then I hand it off to the designer and they finish the product, make the buttons match the rest of the buttons, fix the padding, whatever. It certainly has accelerated that part of my workflow, and it produces way better looking front-end UI styling than I would care to spend my time on. If I didn't have the designer, the AI-generated CSS would be good enough for most people. But, I wouldn't trust the AI to tell me if a page "looks weird". I have no doubt it would become a nuisance of false-positives, or just not reporting problems that actually exist.