|Image via Flickr, Garageband logo, by beoes|
The music you choose indicates the music you would have created yourself if you had the skill/time/access.
It isn't the music you would have created for yourself. It is an approximation. Just as the products and services you buy aren't those you would have created for yourself. They are an approximation.
As a 'customer' to get closer to the product you would have created yourself requires you to invest some of your skill/time/input into the the process.
As an organisation your role is to create the platform to enable your customers to invest.