The difference between a recording and a live gig (that relates to music) is a fixed artifact vs live in-the-monent playing (improvising, imperfections, reacting to the audience's and night's flow and energy, vulnerability, and so on).

Apparently some people think it's the light show, background settings, smoke machines, makeup, and general clowning about.

It's rather them that might as well go to watch some Michal Bay flick on IMAX then - as they aren't interested in the musical performance.