The “oppression pyramid” is, AFAICT, a right wing fantasy strawman version of intersectionality. What they get wrong, and my hypothesis is they get this wrong because so many right wingers can’t help but see almost everything in terms of a hierarchy, is that there’s no hierarchy of privilege or challenges or discrimination or anything like that, but rather (according to intersectionality) various categorizations and groupings and societal phenomena can intersect in complex and unpredictable ways, and should be considered and studied with regards to public policy.