If a man is keen for all his family to have the same surname it is likely that his wife will be the one changing hers to meet this need.
If a woman is keen for all her family to have the same surname it is likely that it will be her that changes name to meet this need.
The default of children being named after their father is hardly going to change when so many women remove that option by changing to their husband's surname.
Also it is generally women who end up with all the extra paperwork to change their name, sometimes several times, deal with "is that Miss or Mrs?" when they give their name out, get asked what their maiden name was, asked why they didn't change it etc. Whereas most men just sail on through life as Mr Surname, even though in theory it's only their father's surname so they might as well change it when they get married.