Here is a photo of Payne Stewart. I too like to dress up out on the course for two reasons. 1. It makes me feel good psychologically, and, 2. If it is a great game, why not look great! I see a lot of golfers who look like they are Homeless. I don't dress like Stewart but have nice duds.
If you're ever interested, @Patrick Anlauf, my good friends at GolfKnickers.com will have you dressed to the nines (or the eighteens?...😎)