There are no guarantees in live theater. Part of the beauty.
I never understand the idea of being upset with performers for taking their time off: whether it be sick days, personal days or vacation days. They are people that get sick, that have personal issues, that have commitments. While I might be disappointed to miss a favorite performer, I will not begrudge them their right to take the days off. I can't expect them to do anything I wouldn't do....and while I don't take many days off from my job, I do on occasion. Sometimes I need a "mental health day", sometimes my kids have events I must attend, sometimes I'm puking my guts out.
Yes, kudos for any performer that never has to miss a performance!
If we're not having fun, then why are we doing it?
These are DISCUSSION boards, not mutual admiration boards. Discussion only occurs when we are willing to hear what others are thinking, regardless of whether it is alignment to our own thoughts.