The whole push for gay "marriage" was never about gays' rights to engage in the relationship of their choice (which they could do without the pretext of "marriage"); it was about trying to be normal.
Normal people get married; therefore, if gay people are allowed to marry, they will be normal, too.
Years ago, when I was a student at UC Davis, some lesbian wrote a letter to the editor of the school rag--that was exactly her argument. Her family did not see her as normal, but if she could only get married to her lover, then her family would realize that she really is normal, because normal people marry.
Sociology studies for years have documented that the gay lifestyle is radically different than that of heterosexuals. Perhaps that is the real reason for their problems.
I believe many normal supporters of “gay marriage” are hoping that while it can’t cure/fix them, it will at least get them to stop cruising rest stops and such (living dangerously). Jeffrey Dahmer’s targeting of gays showed how vulnerable they were in a lifestyle where anonymous sex with countless partners is the norm; some hope “gay marriage” will end that.
That's like the disasterous argument that if we expand the number of homeowners we will expand the number of people in the middle class, because owning a home makes you middle class. That worked out well, didn't it?