Yes, I've seen Rush, and just like every other musician on the planet, *every single one*, they are imperfect. I'm talking about literal perfection and you're talking about "dude, that was perfect" kind of perfection. It's how you can tell a drum machine from human drummer (even one that's triggering electronic sounds) and how you can tell when someone is lip-synching. A human being cannot consistently perform any rhythmical part as accurately as a sequencer can, no drummer can produce the *exact* same sound from a snare drum with every hit like a drum machine can, and no singer can hit every single note as accurately as a keyboard instrument can. I suppose an argument could be made that none of those electronic devices can produce literally perfect results, since there are physical limitations on the capabilities of the electronics. But my point is that when you mold a performance to the level of accuracy of those things it's no longer a human performance and that can come through in the final product.
Obviously there are levels in between and it's all a matter of opinion anyway. To me there's a difference between punching in or digitally editing to remove an obvious mistake and recording triggered drums into a sequencer for perfect quantizing. If you're going for an industrial, mechanized sound like Fear Factory's Digimortal (in which the drumming, and possibly guitars from clues in some places, is obviously digitally assisted in some way) then it can be cool. If that was done to a Nirvana album I think something would've been lost. I am by no means suggesting that anyone should purposely make a record sound bad or perform poorly. I'm suggesting that human performances, which are going to be imperfect by nature, should be left in a more natural state most of the time, unless its purpose is specifically to sound unnatural or mechanical. If you don't agree, cool. I'm just venting opinions.
That was a bit off topic but it was brought up, so there's my shit for the pile.