i'm a bit of a fujo and even I can admit that if you think about it deeply for even a single second women's obsession with M/M ships is largely a product of misogyny.
IMO all shipping is a form of self-projection. The desire to project into a M/M relationship is the desire for a relationship without assumed patriarchal hierarchies. I would hesitate to use the term 'male worship' here... Still, fujos certainly idealize m/m relationships in a way they do not/cannot idealize W/W relationships, but because what they idealize is the male experience (male privilege). As others have pointed out, there is a not insignificant number of nonbinary and tboy fujos- that's no coincidence.
It's certainly not that 'people don't find two women together sexy/romantic', as that one commenter suggested. It's that there are aspects of patriarchal socialization that make W/W stories more complex, more fraught with the possibility of hatred and discrimination. i think this also plays into why 'toxic' yuri is so popular (if the tension is coming from inside the relationship, it's more easily resolved).
like you said, there's no 'patriarchal plan'- just a confluence of patriarchal socialization that maintains itself through the absorption of new ideas.