So why do you care if polygamy is legalized if you wouldn't use it and it would make no difference to you?
Because the real goal of legalizing polygamy, like that of legalizing gay marriage, is really to de-legitimize monogamous heterosexual marriage, not to promote anybody's rights. This is the best explanation I have for the two obvious, yet here ignored, points:
1). That all those who are against marriage as an evil and opressive institution enthusiastically support the extension of this evil and opressive institution to gays and polygamists.
2). That the same folks who, when the called for civil unions, swore that it would never lead to gay marriage, what a ridiculous idea -- only to turn around on a dime the minute they got unions and declare any opposition to gay marriage is absurd; and when it was noted that gay marriage will lead to polygamy declared this is the paranoid delusion of the evil racist right -- only to turn on a dime, the minute gay marriage is approved, and declare polygamy is a human right and anybody who opposes it is an evil racist right-winger.
(1) and (2) make no sense if the goal was merely gay rights, makes perfect sense if gay rights was merely a step in a campaign to dissolve marriage in general.
The experience of (1) and (2) teach one that, quite apart from polygamy's inherently misogynistic and anti-female nature, another reason to oppose polygamy is that it is easily predictable that legalizing incest (at first, between adults) would be the next step -- and then, no doubt, pedophilia and necrophilia. (I wish I could be sure the sarcasm intended by me about these latter two is justified; I fear it isn't).
It would be done using the the same paper-thin, worn arguments: "sure, SOME incest is like
that, but what about the case of Ms. X and Mr. Y, who are father and daughter and love each other very, very much, in all senses of the word? Why are you DENYING THEM EQUAL RIGHTS?!?! You must be one of those RACISTS who opposed pedophilia, too! You just oppose it because you consider it ICKY!".
Well, call me an evil racist, but I won't like to see the walls of the nursery and the mourge coming down in the sexual revolution, and that is another reason to oppose legalizing polygamy.
P. S.
Let me get one thing straight. I am NOT opposed to gay marriage
per se. But the gay marriage cause, as fair to gays as it might be, had been taken over by those who real goal is destruction of marriage in general; and who use, not arguments about fairness, but threats and excommunications -- "everybody who opposes gay marriage is racist" -- whose purpose is to simply shut down the discussion.
This is why, while I would not be opposed to gay marriage in theory, I fear that, in practice, its legalization would just be a new advanced base for legalizing polygamy, incest, and more, which is a good reason to oppose it, at least until assurances to the contrary about its practical outcome are forthcoming.