That's been my experience at least in the 15 or so bands I've been in over the years, and guitar players in particular seem to be bad at simple troubleshooting. I played a show a few weeks ago with a band that was a throw-together. Keyboard player had 2 new mixers which he had to use because there were 3 of us singing and drums were mic'ed and he ran out of inputs. He asked me if there was a way he could connect the smaller mixer to the larger one. He didn't know the first thing about EQ. Guitar player's pedal supply wire was broken, and he didn't know you were supposed to wind the cord up with some slack where the wire leaves the adapter. I told him I had a spare adapter with me (-9V tip). He refused to believe it would work, thinking his 2 pedals would be damaged and that he'd need a special Boss 9V supply. Another guitar player was using a shielded cable from amp to cab. All his cables are wound around his arm...hand to elbow...you get what I mean. That was a particularly frustrating band to be in. Every show had a different defective signal cable. Every night we fought awful AHH! AHH! BZZZ!, and we'd have to wait for him to kick every wire to see which one was bad. Every show. On another occasion (fill-in gig), a band brought 4 8-ohm monitors and wanted to use an amp rated for a 4 ohm load. I told them they shouldn't do it, but they said "It's always worked before". On another gig, we lost one of the subs. The amp was getting signal input but nobody thought to try another speaker wire, or maybe even swap speaker outputs. I've talked to other bass players in other bands, and they are the troubleshooting brains as well. I honestly think a guitar player's brains are different than a bass player's. Anybody have any of these experiences?