The trouble is, society has made an agreement, expressed by laws, that artists are entitled to a fee every time the music changes hands. "Giving" away an MP3 or a ripped copy of a song is "giving" away something, which you do not own in the first place. It is not yours to give.
A writer or performers better work is often the result of years of effort and practice. Casually "sharing" it with lots of other people, while offering the the performer nothing at all is hardly a great act of generosity. It isn't your gift to give.