A definition of a high-end system is that it DOES allow better insight into the music. That's the whole point. It does approach good live sound and provide the emotional impact that live music can deliver.
Yes, well said.
For example you get better dynamics and fine dynamic shadings, which allow you to experience much more emotionality in the voices of an opera -- or any dynamic singing for that matter. There is just more insight into the musical expression. The better presence of the voices and more accurate tonality makes them more real, as if you are there, which also helps with emotional engagement.
Another example would be much better insights into, and engagement with, complex orchestral music, due to the fact that you can hear all musical voices and strands separately and clearly. You just don’t get that experience from mediocre reproduction.
Of course, one could come up with yet other examples.