Just for historical anecdote, the ILO agreement of 1930 on banning forced labour had the same tilt to it: It was for women-and-teens. It is titled « Elimination of all forms of forced and compulsory labour », but excludes « able-bodied men aged 18 to 49. »
Men have always been at higher risk for suicide and death in general than women (especially at work in dangerous jobs), at least since childbirth was made mostly safe. But men's lives don't matter in most modern societies, since they are easily replaced.
https://www.ilo.org/wcmsp5/groups/public/@ed_norm/@declarati... Article 11, page 30.
We had to wait until the UN convention of 1957 to have a universal treaty on forced labour which included men.