I hope it didn't come across as "here's a glib answer to what I perceive to be a stupid question". Succinct is a much better word, thanks!
I'd also like to add that while sound engineering a massive show with many instruments, full drum kit miking etc. is a serious undertaking, operating a couple of powered speakers and a small (say 8 channel) mixer for a covers band isn't rocket science. In my covers band, the drummer and I do it. We've learned as we go and refined what we do in response to audience feedback.
Share our spoils with a knob twiddler? No way