well the reason to that is her power something kinda forgot what it's called. she was the one who inherited the "power" which is past through generations etc etc. its kinda stereotypical.
It can’t be the other way around cuz all the etusians(can’t spell) are cursed so they can’t take over the head position, so their wives usually do.
They can't because of the curse. Also every generation can only have one son because of the curse too. So they can only opt out to make the bride the leader.
It's good for light reading. There to young to get married but there relationship is so pure. Also, I don't understand the part where the MC need to be the one who inherit the head position. Is it supposed the other way around?