It’s not just having an eye for it; UI design is an entire field, and human computer interaction (HCI) has existed since the 70s. I think that a large part of the problem is PMs / managers / tech leads not understanding that design has subjective elements but can also be objectively good or bad, and that they can’t tell the difference between a design that is correct and works well but might not look very flashy vs something that gets lots of likes on Dribble but is awful to use. This feeds into itself and leads to more people thinking that they know what good design is (pretty) and hiring other people who call themselves designers who have no idea about the actual science behind it.