My favourite one night stand band, auditioned, got the gig, learned the set, rehearsed for three months, first gig booked, 100 mile drive each way to that London. Singer, of the low work-rate/moderate talent/high maintenance type, hasn’t brought his microphone and then kicks off when the venue don’t have a spare (I had one in my kit bag but thought I’d keep quiet at least a while). So, after s kerfuffle I lent him a mic through which he was rude to the venue, to us, and better still, to the audience. A few of my mates were there and said they thought it was irony at first, it was that bad.
So to my mind a singer who owns a mic and who takes it to a gig is already at the better end of the singer scale 👍