Well, I suppose a Hammond B3 is a musical instrument which features elctronic circuitry. Playing this instrument requires a skilled pianist.
A computer is not a musical instrument because playing it requires no skills other than being the sort of **** who wants to get pseudo-musical noises out of a fúcking computer.
They might as well be making sandwiches.
Nothing wrong with electronic music, but pretending it is live is a fraud. If people have a great night, it's because they've come out to have a great night and are probably off their tits on something and willing to suspend cynicism.