I think that sometimes people are also intimidated by the good systems they hear / see. They recognize the quality of what they're listening to, but believe that to get much better sound that the boom box they have, they're going to fall prey to spending thousands more than they want to. I find myself constantly reassuring my friends who are kind of interested that they don't have to spend what I spent or become as fascinated by it as I have to get much better sound. I was out looking at big-screen TVs with one such friend and went into the speaker demo room. They had selectable CDs and speakers to choose from, so I put on Diana Krall's latest over some inexpensive speakers - it still blew him away, but it seemed achievable so I think it's more likely to stick. We moved down a couple rooms (up in price) and played the same song and he heard an even (much) better rendition, so I think he began to see that you don't have to spend a fortune, but that the more you spend, the better it gets. The key is to demonstrate that you can get a lot better sound for an amount of money that pales in comparison to what people spend on many other things, and that it can be simpler than the huge stacks many of us have built.
I find it amazing, too, how many people don't find music to be an important component in their life. Many were fanatics when they were young and have lost all zeal - I don't understand why. -Kirk