No you don't understand, AI is VERY BAD at front-end and CSS to the point you cannot use anything.
It's not passable even slightly.
Everybody with experience knows that FE has always been "harder" than BE - but BE the stakes are higher since it's the business. FE is often "just UI" and despite that being very important too, you can throw it away and start over a lot easier with a UI than you can with a BE platform.
I digress, AI sucks fucking dick at UI.
Google Stitch is pretty awesome at front end layouts.
What is an example UI that AI would fail to create?