Rav Miller was clear that a man (ideally) should be the breadwinner. With a Kollel family, that ideal may be unattainable. Kollel is ideal too for those that can.
gavra, I’m not sure what you mean she has a right to reject a Takana of Chazal. She might reject it, same as she might reject kashrus.
Jothar, it has nothing to do with “power”, its all about how a marriage naturally works and what the Torah expects. Of course both points are a sine qua non of marriage; Rav Miller said so befeirush in the quote from his Sefer above.