a whole bunch of the mentioned causes/issues/problems are reasons why in my (home)studio,
-there's no PC
-I don't do copy & paste verses or choruses.
-editing as a whole is minimized to cut off noise trails of idle tracks, clean up intro/outros, etc.
Basically, if you can't play your part in 1 go in a studio, why would you be able to do it on stage? Ergo, you have no business being on a stage unless you can manage to finish your song's part without major fuck-ups. What good is, say a drummer that can play 1 verse perfect, and the next 3 so-so? Sure, you can copy and paste the perfect one...and then what...the guy gets up on stage, performs, does a shitty job for 3/4th of the song and people can point 'see, they just fixed it in the studio'.
Look, I'm not talking about multi-harmonied vocal or guitar parts, but just your basic rhythm 'foundation tracks'.
(for those actually interested, I record via an A&H GS-R24 analog/digital desk into an Alesis HD24XR (same A/D converters as RADAR) with a nice set of outboard dynamic processors and effects)