@JessicaLovejoy I was going to say something similar to @leon s ...
The logic is something like this..
IF she believes unsuccessful men are inappropriate to date because their lifestyles and values wouldn't be compatible with hers in long term/serious relationships, THEN married successful guys are also inappropriate because they can't fully commit to another long term, serious relationship. She wouldn't get what she wants either way, so of the two, it'd be better to kill time with single, less successful guys, because its less likely to have repercussions which could actually wind up impeding her career..
But, IF unsuccessful guys are inappropriate because only success is sexy, THEN there should be some divorced or widowed successful guys out there. They may be much older, but their success and/or money makes them sexy still.