There is a psychological phenomenon (projection bias) that clouds this debate (sic?), and i’ve witnessed (in certain peeps close to me) a tendency to think any public display is ‘simply showing off’, ie if someone sings in a pub /just for fun, they’re ‘showing off’, if someone is jogging around town minding their own business they are ‘showing off’, even moreso if the runner is fit looking etc etc.
While sometimes it is true about the people being judged, it is also sometimes true that the judge is simply projecting, and the uncomfortable truth for them is that they themselves are ‘always on show’, in that they are convinced in a self-conscious way (either extrovertly or introvertly) that the general public are always concerned with THEIR appearance or public actions.
I don’t tend to care what others think about my appearance, as it’s my business, and likewise I’m not really concerned with others beards, state of dress/undress, hairstyles, dog breeds, sports, tattoos, etc etc. But that’s just me.