Another thing about musicians is that they tend to project what they
expect to hear over what they are actually hearing. It's like our
spouse hearing a "yes" when we clearly said "no". That happens. If
they've heard a particular piece hundreds of times, and they've played
it too, they stop listening to details because they're intimately
familiar with it. The recording is taken for granted. They just hear
things that are "out of the ordinary", like a note that's changed due
to errata, or some extreme of tempo, or a dramatic change in
interpretation, etc... This is like our daily commute to work. How
many can say they actually pay close attention to their surroundings
on their daily drive?