I think music and lyrics are equally important. If a song is going to have lyrics, make them good, goddamnit! And if the lyrics are there for the sake of having lyrics, why not just make the song an instrumental? The lyrics are (supposed to be) there for a reason, and that's to communicate with the listener. Additionally, the singer is as much a part of the band as any other member, and their voice is just as important as any other instrument, otherwise there wouldn't be singers. To dismiss, or even lessen lyrics in a Maiden song is basically to dismiss Bruce himself. Because if the lyrics are not that important, why bother with a singer?