Human nature can and often does overrule love, fairness, compassion, equality, politics, religion, logic, reason, common sense, and ‘what oughta be’. One option encourages it. Another option discourages it.
Competition within a couple’s decision making generates incompatibile emotions. It worsens like an untreated infection and stirs his dominant nature. Competition stimulates thoughts about her as dispensable.
Cooperation breeds compatibility and demonstrates to him that he’s indispensable. As men become more indispensable, they grow in steadfastness and devotion to whatever they are doing. Cooperation works more like exercise than apathy.
She determines whether competition or cooperation prevails in their home. By competing less and cooperating more, she capitalizes on their opposing natures. This improves her chances of moving him toward indispensability and keeperhood.
It sounds lop-sided. One option works against her. The other favors him. It may be why God designed her and Nature endowed her with so much expertise for managing her relationships.