The case against complex UI hides the fact that nobody wants to take their time to learn a piece of software anymore. Attention spans are so short, if the system doesn't do all the thinking for you, why bother with it? We are just moving the human laziness through another layer of indirection. The fact never changed in the past 30 years: some domains are complicated and you need smart people on both ends who can bridge the gaps. The dream has always been the same with nocode, lowcode and whatever, it doesn't change this fundamental flaw.
Consider building your own blender software. If you know nothing about 3D you start off in your language and the LLM will happily produce UI for your level of understanding, which is limited. Over time you will reach an understanding that looks just like the software you were trying to replicate.
Currently the ecosystem around UI changes so much, because its always been a solved problem that people just keep reinventing to have... something to do I guess?