Most gay marriages are non monogamous, so your point is ‘plenty’ misleading. Marriage is legally less beneficial for men in the us (divorce lawyer is paid by the men), and marriages don’t mean stable relationships. An emotional marriage is likely less stable than a cohabitation.
> Several research studies show that about 50% of gay male couples are monogamous and about 50% allow for sex outside of the relationship. The research finds no difference in the level of happiness or stability among these groups.
Because the first point is challenged: https://www.thegaytherapycenter.com/gay-men-in-open-relation...
> Several research studies show that about 50% of gay male couples are monogamous and about 50% allow for sex outside of the relationship. The research finds no difference in the level of happiness or stability among these groups.