Were you to take a random sampling of the average music listener and say to them: “Quick, hum a few bars of "One Fine Day." Now, "(You Make Me Feel) Like A Natural Woman." Great. Now who wrote them? Chances are most people could belt out the entire tune for you right on the spot, but few would be able to identify Carole King as the songwriter.
Partially, this phenomenon has to do with how we view musicians. We love the sparkly, charismatic lead singer, but care less about the bass player keeping the beat, and even less about the person who created the music in the first place.