Ah, OK, going back and checking the plot, she does end up with Raoul... I suppose you can make it work, but -- I don't know. She pities the Phantom, giving more sympathy towards Lex when you put it in the LnC-verse. At least in the musical, you feel like the Phantom has control over Christine, and I don't really like that when looking at the Lois/Lex relationship.
But perhaps I'm reading too deeply. It is a lovely song that I've sung MANY times.