I completely disagree. If Superman is wish fulfillment (to a degree) why can't that be relationship-wise, too? Back in the 90's, they got married when I was 16, and I couldn't have been happier. At the time, I didn't think I'd ever have a relationship as good as the one I was reading about (it is fiction, after all). Now I definitely do, but back then it was wish fulfillment of a totally different sort than powers/etc, and I was glad to "live vicariously" through it.
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On another note, I've been reading the comments under that article, and the reaction is pretty much the same over there. Most people are pissed about the very idea of it, and hopefully DC is paying CLOSE attention.