There are three recognized formal disciplines in web front end. I have listed them in my posts, ad nauseum. They are HCI, Developer and Artist. They require separate fields of study. The first is a psychological field of study, the second is an computer science fields of study and the last is studied in the arts. Some people cross all three, few do it well. Many from the latter two, lack any knowledge of HCI but pass themselves off as experts in the field.