You are correct. You are never going to hear an unamplified rock concert.
‘’Although I listen to all kinds of music, I found it was classical concerts and acoustic jazz was what you needed to listen to to in order to zero in your audio system. It would make other kinds of music sound better as well. This helped me develop an empirical ruler, hence helping all music.
Alternatively if you only liked rock… you could get JBL and try to get yourself into a recording studio to understand how it was mixed.