I think a better way to put it is that generally, UX experts know what they're doing. But UX experts aren't the ones that actually design the UI, that's for a UI designer, and those folks are wholly unqualified and have zero business actually making UIs because they don't know a god damn thing about good UX.

A UI designer is tasked with making a UI beautiful, a concept that is highly subjective. A UX designer is tasked with making the UI functional, which is far less subjective.

Guess which person the management takes more input from?