Part of it is also lack of care, taste or vision from the slop-pilot. Sure the clanker designed and built the UI, but someone looked at it and went "Hell yeah! Ship it!".

Developing good UI/UX is hard, like really hard. Very few people are good at it and if you're not good at it, what makes you think you're able to recognize a good UI when you see it? So much thought and and foresight goes into a good UI that it requires a serious amount of prompting. When I've worked with actual UX/UI designers, my job has been that of the LLM. The designer spends ages on planning and understanding, then prompts the developer to create the actual UI and iterated endlessly.

Industry most hasn't cared about UI/UX since the 1990s and even if it started to cared now, employment is fairly safe, because it was always mostly research, labs and prompting. It's just that now we can iterate faster because prompting the LLM is faster than prompting your five .Net developers hidden away on the second floor, in the office behind customer service.