I like the old fashioned admonition to "mind your own business" re people dressing up or down. Another one I like is "eyes on your own plate."
Here is a link I enjoyed every bit of. In Japan, fashion magazines are thriving but they don't have the monolithic editorial viewpoint that I recall from years of reading U.S. ones. Instead, they examine eras and trends from a template point of view. And people study how to put outfits together and then refine them. And it is this refinement or improvement that garners respect for the individual.
https://www.youtube.com/watch?v=wpqH-xq0aTs
Why the Japanese Dress So EFFIN' Well