This mentality carries over to many forms of music, where fans prefer to hear their live music performed exactly like it was on the CD that they purchased. Here's how I interpret music. Jazz has many forms. Big band swing is one form using lots of structure in a large group setting. Rock-jazz fusion has more qualities of instrumental rock.
Hot jazz has a swagger reminiscent of New Orleans funeral marches.
However, all of them have the improvisation quality that makes jazz unique from all other forms of music. Because of improvisation, jazz is quite often bittersweet. You will never hear a solo played the same way twice. The musician has a specific feeling at that moment in time. The listener does, as well.