Frame it as a public health issue if you want, I really don't care. There is an argument to call affirmative action racist, but pregnancy and breast cancer are biological processes, not rules/systems created by society. No one is calling them sexist. There are plenty of issues in society that disproportionately hurt men that need to be resolved too and until there is an alternative term that is well known, I will happily call the draft and handling of men's mental health sexist too. Why can't we say that gender affects people's quality of life in different ways and try to address that? You don't need malicious people to make a certain demographic's lives worse.