I agree with all your points except one. Women do not benefit from patriarchy. No one benefits except the top 1%.

Austen is a perfect example. I don't see Austen's characters as purely status chasers. Austen is constantly reminding readers of how classicism destroys real love. If anything, Austen reminds readers to rise above the patriachal oppression. In Persuasion, Anne is haunted by her decision to choose status over real love. If Anne had a Harvard MBA, she would have chosen Wentworth from the start. (Of course, there would have been no storyline then.)

Austen was painfully aware of her lot in life. She complained pretty loudly about the patriarchy. (It's probably why Twain hated her so much.) It's also probably why she chose to never marry. She couldn't tolerate the transactional side of marriage.