Well Rockstar, funny thing is that professionals use the term "rockstar" in reference to amateurs that think they are better then they really are, it's used as a joke. You did in your original post say that you were "hired" to shoot the band, and then it turns out to be just happen to show up with a camera and meet the band. So if that was the case why all the drama over the "I can't shoot this without light" if you weren't hired to do it, there is no pressure. Having off days as a professional, well yes we all do, however if you are being paid to produce then you better show up everyday, professional athletes are surrounded by other professional athletes as a team, a photographer is one person, and that one person is the only one that carries the blame for a poor shoot.
I've been a professional for over 35 years and have shot under pretty much every lighting condition and in more difficult situations than you've had hot meals, so lets not pretend that I don't know what it's like to work day in and day out. I just came off of an 18 day shoot, putting in 16-17 hours per day, and had to show up and produce quality every day, under constantly changing venues, light and extreme weather shifts. Along the way I shot a few songs at an outdoor concert in -20 weather. I'm honest with my opinions, and have the experience and skills to back up what I say.