Because the whole "thug" idea centers on black men, and black women somehow having an intrinsic desire to want and desire these sorts of men as a constitution of their being. When we talk about thugs and the women who love them, we arent referencing cambodian women and men...no need to beat around the bush and ignore the racial implications here.
I don't subscribe to that though. Women of all colors are drawn to thuggish types. You never seen a Mexican thug pull chicks? A white one? All women are drawn to power, confidence, wealth, and a thrill. However just like men who have to wade through the "banging body but nothing up stairs all about the drama will do nothing but ruin your life" thots, it's up to them to discern the real from the fake and the beneficial and healthy from the insidious.