He said that the male Qawama over women is a form of duty and not an elevation.
since Allah (Glorified and Exalted be He) says, Men are the protectors and maintainers of women, because Allâh has made one of them to excel the other, and because they spend (to support them) from their means.
Hence, Allah (Glorified be He) makes it clear that He has granted men Qawama over women due to two points: First: The favor of men over women in general. Second: Men's spending from their means (to support women) through what they pay of Mahr (mandatory gift to the bride from her groom) and other expenditures.