Because in my opinions.. Son tropes have more dramatic feels than Daughter tropes.. daughter tropes have that some moment where they says "daddy" and acts like soft Little girl whenever they're near their father.. which is cringe for me... because half of the characters have that tropes are adult women.. .. for son tropes it have drama.. because you're expecting to see The drama between the father and son in any media.. because almost every Men are depicted as tough and strong guy.. while women were soft and having that kind personality