In all disciplines you find more not so brilliant people than truly brilliant people. I am a software engineer, but it happens that I cannot understand how our UX professionals have designed our product's UI. Or if I understand it I find it awkward. Now you could say that's because I am so much below average, that I am a hopeless case... But we get customer reports that they are more confused than I am. So having UX people is not silver bullet.

A subset of UX people want something that's beautiful or elegant or cutting edge more than they want something that actually makes sense for the user.

Just like some engineers want something that's technically impressive more than they want what's good for the user.