I’ve struggled with this. On the one hand I agree, it at least reduces the spread of disease - IN THEORY. Then I read studies that show hardly any, if any, same-sex “marriages” are monogamous. The average couple having at least one other “partner” per year. Now throw kids into the equation...
Homos don’t need marriage as an excuse to remain “monogamous.”
Their whole argument is order from chaos. What starts as chaos cannot, by the laws of entropy, become order by human means.