Females dont try hard enough to remain feminine.
Females get pregnant and have insufferable hormone cycles
Females are literally female so they are unable to relate to being male and lack that empathy
Females are biologically alien to male anatomy and thinking
Males have to renew their role consciously every day which means they keep their attention on what a man wants
Males show their devotion by forfeiting their manhood to please, females have nothing to sacrifice and rely on trust which inevitably isn't enough since the only investment of risk is pregnancy. By contrast, a male knows he will never get his manhood back so he is always more invested in his role, knowing he will have wasted his life if he cannot fulfill his commitment to his man. If he fails, he will have neither male privilege nor social accommodations given to females.
Males have to make an effort to keep giving to keep their situation; females simply have to be present. Both know they can be disposed of or replaced, but a female will remain female while a male that fails to please will eventually become nothing if he has no one to keep him. The minute he takes the leap to become the subject of another man and surrenders his manhood, the clock is working against him. A female can simply trap a man with marriage and children and perpetuate her situational comfort with legal force.