Seems to me that we're talking about two different groups of people here. To make an analogy (God, I love analogies), it's like a conversations between a photographer (realism) and an artist (impressions). Both camps have valid points and it's possible to appreciate both disciplines on their own merits. I enjoy looking at Ansel Adams prints, but I enjoy Van Gogh too. Both very different interpretations of the world around them.
Seems like a similar situation here. We can record something in the studio that can be played live (photograph), or we can create a sonic painting (art) which can only be enjoyed on the medium used (a CD in this case) and never intended for live performance.
In this instance Dave, you're really asking if it's okay that the artist uses a different color blue for the sky. I'd say, fine - if that's how the artist wants us to see the sky.
With all the new tools at our disposal, I'm not sure where we fit in these days; part photographer, but at times, artistic collaborators as well.