I think so too. People in the audience are familiar with the quality of the music in many different ways. Every individual perceives the show differently. There are of course some main things that a band should do, give a good and balanced performance, and make a good atmosphere on gigs. Band in whole is watched by the audience, and especially the singer, so there must be a balance in audible music quality on stage. But not always is this the case, actually quite often audience want even
notice bass line in the song because it tends to hear voices and guitars more often. Also singer's voice is first in line, and if the singer is bad, not one, not 5 guitars can cover it, because audience listens to the singer MOST of the time. Also bass is helpless there because it is barely audible, so it can cover the lines in some degree, but not as near as guitar, and certainly not cover the singer's poor singing. I've played and seen a lot of gigs where people make mistakes and I don't think it is
irrelevant but I do feel that many times the audience is not something that you can impress just by playing good and precise, but you need to play it from your soul and they will understand it, and even
then it is not the rule. Sometimes maybe they just don't like the songs. Tough job music business