@CTRebbe I’ve read teshuvos from chashuve poskim who disagree with some of your assumptions. I don’t necessarily agree with them though, as other poskim who I usually follow argue.
In any event your statement about being motzi them in kiddush is misleading. You don’t need arvus to be motzi others. Only if you were already yotzi do you need arvus to be motzi. So when you make kiddush for the first time, you can be motzi them even if they aren’t subject to arvus (yes I know about the MA and bring yotzi kiddush with Maariv; the MB and AH argue vehemently against it).
Also teshuva is irrelevant to the discussion. Even if certain “club benefits” don’t apply to them, they’re still obligated in the Torah, which last I checked included teshuva.