Dunno about UI/IX designers, but those of us who work with both structural (aka, engineering) constraints, as well as the ‘aesthetic’ ones in real life materials (like wood, metal, glass, etc.), find the two pretty inseparable. It’s equally important that stuff ‘works’, and it ‘looks good’!
Over the past 20 years, I have noticed that the most flexible, dynamic, inquisitive minds among my students have been industrial design majors. Industrial designers are bracingly free of ideology and cant. The industrial designer is trained to be a clear-eyed observer of the commercial world — which, like it or not, is modern reality. — Camille Paglia