If it were easy to do, MRA's and FRA's would have accomplished it already. In fact, it is NOT easy to do. It hinges almost entirely on getting the RIGHT KIND of politicians into office. Electing people to high offices who you *already* know don't believe men have rights WRT children and who have a personal track record of acting on that belief will NEVER get these laws rescinded.
“Easy to do” verses “easy to do.” It’s easy enough to do, in fact, but just impossible to get the people with the power to do it to do it. Too much corruption.