DY if you’re talking about schools/ communities that don’t accept children to school and cut off contact with adults who don’t keep to their standards then you may be right. Although technically not fair comparison because those families and adults that were turned away make a certain percentage that we do take in.
If you’re saying mosdos / communities that operate like it’s where we don’t deny a proper chinuch to a child because of his family background etc. then I think it’s the same. Our girls who are seriously into Yiddishkeit, lubavitch “chassidish” as it’s termed, are fully tznius. Those who don’t take things as seriously are no worse off than the same from beis Yaakov.
We are sound more to strengthen tznius, in eretz Yisrael there have been tznius support and discussion groups called maagalim which has now spread worldwide and happy to hear of more ideas.
My point is that it’s unfortunately a global issue because of today’s society which bombards us with everything opposite. Not just an issue in Chabad.