Oh yes, I can see that, but if that IS the case, my question is why Jimmy?
To Luthor he's not just a nobody, he's a nobody who hasn't actually featured much in his life. There would be a counter argument that Jimmy is linked to Superman and so Luthor might have some awareness of his theoretical usefulness (as leverage, a weakspot or the like).
So either from Luthor's POV Jimmy IS a nobody, in which case Luthor wouldn't waste time even knowing about his taste in sweater-vests, or he ISN'T a nobody, in which case he shouldn't have been a candidate for the role of "nightmare fuel".
It just seems overly contrived to make Luthor Jimmy, and not a homeless bum or a checkout clerk.