Part of the problem is that there's a lot of good music available to me. Literally more than I can ever listen to, much of it for free online.
I think the music industry has to adjust to handouts (eg, donations on their site) and merchandise/performances rather than viewing the song itself as something worth selling.
If there's a barrier to me using the music easily, including unavailability of the lyrics, not only am I not going to spend money on things that make them more money (shows, merchandise, etc), but there are a dozen other artists who are all clamoring to make it easy for me to hear their music.
The song - and attached lyrics - should be a way to get me to buy other things or given them money after, and not try to be "sold" to me.