Vestal something like that yes.
Explains a lot of things like primogeniture, droit de seigneur a lot better than just "it's to ensure that a man only raises/passes on to his own kids". It all about transfer of power and benefits, creating allies, creating norms that enable manipulation, and also to bypass competing strategies like "just being a decent, reliable person/parent and treating your partner well". (And it also makes both "being a good guy" and "pretending to be a good guy" more defined alternative strategies, especially in males who don't have the resources to compete head to head with the patriarchy).
To be honest, I don't like oppression, full stop. Bit of an obvious statement on the face of it but...
It's always struck me that oppression of any kind is all the same thing. Whether the moniker is racism, sexism, religious hatred, gender bias, snobbery, ableism...it all comes from the same root. And that root could be personality traits, which in certain circumstances confer some "advantages". You see different expressions of it in different areas, and considerations of intersectionality/privilege is used as a divide and conquer mechanism.
Something like a desire to dominate and put others down/succeed through force and whatever other means available, combined with lack of empathy, willingness and ability to manipulate.
A high risk and high reward strategy, where you have a good chance of pushing a lot of the costs onto others.
But I'll stop rambling before I get all rainbow coalition.