I guess it's all a matter of how the song's writer/lyricist would like their art interpreted. Some want their fans to view the words/meaning as they do, whereas other artists (like Queen) prefer for their work to have an air of mystery and ambiguity. Although, of course there are songs in Queen's repertoire where the band members open up and explain the original intentions behind certain compositions.
Thanks for the article, really made me happy to stumble across it!