I'll have trouble explaining, then, as it takes in the concept of 'blowing one's own trumpet', boasting, self-promotion, modesty, and more, that one either captures or not. I was involved with a couple of bands during the '90s (touring, doing their lights, mostly, but equally organising festivals, or assisting in the tech side, at the console or backstage...), and assisted at many concerts and festivals, all over France. The sales of promo merch was an important part of the gig, but wearing it oneself was, for just about all the bands I crossed paths with, a 'no-no'. Bands such as Kiemsa, Les Amis De Ta Femme, Marcel Et Son Orchestre, La Ruda, Outrage... A scenic presence, certainly, but not to the point of touting oneself (would be seen as ridiculous...). Better to 'promote' one's favourite band, possibly even another band on the same bill..! Other points of view are valid, of course; this is just how I've always seen things done in the circles I went around in at the time.