The ability to hear the strings and body of the violin, for example, creates a conduit to hear the musician, to resonate with their intent and emotion. The better a system reproduces "sound" the more access I get to personality/feeling/intention.
The predilection of reviewers for talking about the conduit (the sound) rather than the musician is, I think, smart on their part. They are telling me something which is a bit more shared and intersubjective -- "If they can hear it, I can hear it" I reason. When a reviewer talks at length about how they had a mind-meld with the musician, well, that just sounds subjective and, honestly, useless for me as a reader.
People get all kinds of squishy feelings about music and artists -- and that's fine -- but in my book, as an audio consumer, it is too much noise and not enough signal.