You asserted that "Filesharers don't care about anything but their own entertainment."

I would wager that there are fans of artists who donate to artists via concert proceedings or actual online donations while still downloading (for free, from alternate sources) their music. These are not mutually exclusive ideas.

In fact, you kind of have to do this if you actually want to bring about positive change--you support the artist, but you deny any money to the middlemen.