I have no idea why CC does it, but when you import model body skin color and accessory skin color do not match, though they were same in daz. CC uses own body mesh which as you may expect does not match daz figure. The same time, model of genitalia imported as accessory (or clothing) does not change in any way - that means genitalia vertices do not match body vertices anymore and you can not just hide part of body and use genitalia instead.
While retexturing entire model after exporting from cc is still possible, difference between body and genitalia vertice positions make it impossible.
Of course there is possibility to import model into 3dxchange and then hide part of body using some alpha texture, but it is terrible way. First, making such alpha would take ages. And what is most important 3dxchange does not import PBR materials from Daz - that means it is easier to take model straigth into U4 and animate. Inside daz Studio itself - as damn terrible as it is.