[lazzarello]

Some written music can be interpreted in extremely different ways, in performance, especially if the original composer and performers of the era are no longer living. Listen to Glenn Gould play Brahms B minor rhapsody and compare it to any other performance, then compare that to another random performance, say Arhtur Rubinstein.

As for the question, all music needs an audience for a really good performance. It makes a huge difference and helps in so many ways.