DGTess nailed it. There need not be a sound or persuasive reason. These women can make whatever choice they deem right for them, whether we personally agree or not. Not all PNMs are seeking friends -- like it or not, there are status seeking PNMs; there are Regina George PNMs. If a PNM wishes to ISP, so be it. Lectures are not going to change their minds nor necessarily make them feel bad. Often it has the opposite effect.