When you play everything live you dont have the option of just stopping and restarting, it is what it is and you have to just hope nobody noticed. I try to explain this to artists I work with that are incapable of doing something in 10 takes let alone 1.
Some artists can barely spit a sentence before fucking up and wanting to start again.
There is getting it right, and then there is those people. Very challenging sessions as a recording engineer.
Or the ones you tell them it was offkey and they NEED to rerecord, but that hurts their feelings and they get all defensive lmao. Oh man, people.
Best artist I ever worked with was Davvo, came to the studio, recorded everything in one take.About 3 or 4 tracks, cant remember now, met him through soundcloud, he came to the studio in the old days and just recorded everything in one take. Best session ever.