For example, social norms would not allow women to walk topless outside except in exceptional situations, even where it is legal. This is often a problem... for example, even the edge case breastfeeding mothers are marginalized;

That can fall under the "exceptional situation" exemption when there is a reasonable reason for them to be breast feeding in public.

more generally, bare-chested women as a class are marginalized.

There's a very simple solution for them: cover up their breasts. I don't see why this is a problem.

However, if we are looking at domain knowledge as something worth exploring to allow you to interact with other people, as in the examples given for coders,

That would require that the "domain knowledge" be actual knowledge and not BS.