I can sympathize with all of the horror stories here about unreliable musicians and have had my share of dealing with them. However, it's been decades since I've had any real problems with lazy, unreliable musicians since, starting long ago; I simply refused to associate with those types of personalities and
cannot stand to have my time wasted.
I just cannot deal with those types of musicians...at all.
Fortunately I've been lucky enough to have been involved with many professional musicians who definitely go 'the extra mile' at gigs when they are sick, have unexpected personal issues turn up, etc., particularly one singer I did gigs with for years (she was a combination of Aretha Franklin and Janis Joplin
). She sang thru colds, fevers, and she insisted on going through with a long scheduled show last summer a couple of weeks after a major gall-bladder operation (a sudden health issue came out of no-where). We let her know that we'd have no issue cancelling the date, etc. but she
insisted on seeing it through. She did awesome.. a little off her game but came through big time.
One gig we did she was clearly very, very sick with the flu and again, insisted on playing. She did say that she 'might have to bail suddenly' and for me to dust off several tunes I sang to cover 'just in case'. Halfway thru the night she said "you're up!" and darted off to get sick in the bathroom. Three songs later and she was back up there wailing away. Certainly not 100%, but fantastic sounding nonetheless.
Last April there was another very nasty flu going around here. Everybody was getting it. The bassist showed up for the Friday night sets and you could tell he was mega-ill but didn't want to bail on the gig. There wasn't a band-room, quiet space, etc. for him to just try to relax between sets so he just lied down in a fetal position on the grungy, hard floor which was curtained off to the side of the stage to conserve his energy and try to settle himself. Respect...!
Kudos to those die-hards...makes me proud to associate with them.