I really dislike the violinist example, but even when trying to not argue in bad faith: What percentage of people going past would actually go to such a conert

I really dislike the violinist example, but even when trying to not argue in bad faith: What percentage of people going past would actually go to such a conert? What (disjunct) percentage of people could actually tell if the violinist is merely playing not-obviously-wrong notes or is even merely "good"? I don't usually listen to classical music, or solo violinists. So unless a random mood struck me, I would not stop (but also not go to the concert). If this was a (metal/punk rock) band I liked then the setup would be more realistic, but the sound could still be terrible or at least too weird in that setting. Or maybe I like the songs and am not particularly married to the musicians' particular performance, so if they played other people's songs I wouldn't even like it? And finally, I don't casually take the subway. Even I found this performance terrific, the chance that I can't stop for more than 5 minutes is pretty high, because I need to be somewhere, on time. Not even talking about work, but catching a train or something.