But to actually write poetry like that would require extended study/practice which would go beyond the attention span of most people.
Well that's the point. Classical music is actually being taught in universities and all that. Why pop sucks (and surely not all pop sucks) is that the musicians take it's form for so easy and liberate that they do not need to know the theory behind the music they make. Metal is all the same in that the musicians aren't educated in music - the theme work, the forms/structure etc - because it would need serious research and one would have to give it all his attention. People study to be a composer, they study to be a conductor, an instrumentalist - each and every of these positions requires many years to master. And in the band, you have to be a pro in many of those fields to succeed. There's the composing, there's playing and also the lyrical poetry - until you did not undergo some university degree (sounds silly that way - well we can say until the wisdom of the specific field of art hasn't been transferred to you from a master), there's very high chance that you cannot even imagine the possibillities of art - or you could perhaps end up inventing something already invented. Music needs fanatics like Vangelis, because it should be a way of living, so high value that one should die for it (born in 20th century, i am not really sure about this..but then i remember Balzac dying for his invented world of fictional Paris) - every field of human doing needs people that are curious and hungry for knowledge in terms of knowing history and opening new possibillities. But one man can't do everything.
I happen to know some people studying classical music and am beginning to study it myself and many of them - at least the more open-minded (it seems to me that this term is somewhat pejorative here - i do not use it as described here (http://www.anus.com/metal/hall/index.php/topic,4921.0.html
), rather for people that do not hide behind some rigid mask, preventing them from growth in ways they do not concentrate on - most people are open in the fields on which they are focusing) show very friendly attitude towards metal AND folklore. Of course, even from those elites, there will be a lot of garbage, but hey, what does it matter.
What i wanted to say is that metal is starting to be recognized on this level - and should be kept there for good by people that give their lives to it.