just my opinion but I think most girls get them for how they make them feel/look while wearing clothes, not being nude. So when they get dressed up and go out, wearing that strapless dress, etc.. Most girls I don't think seem to care about how they look nude because in theory no one sees them like that anyways. Even if a girl is a camgirl or OF model WITH a partner they are still probably spending north of 75% of their time clothed and girls care more about that than the 25% of the time they are naked.
That being said... fake boobs suck. and most girls go too big anyways for their frame and end up looking ridiculous; and side note the whole lip filler fad is fucking awful as well.