she doesnt hit on any of the real reasons save one
Well, she’s going to be in trouble.
Not only is same-sex marriage wrong from a religious point of view, but it makes no sense from the secular side either once the societal function of marriage is properly understood, i.e., to produce and raise the next generation of civil society.
Thus, society has a unique vested interest in promoting traditional marriage and it is for this very reason that the civil/secular aspect of marriage actually is primarily a contract between the marrying couple and their community. Society agrees to provide the couple with official recognition and support, including monies that are taken from the general tax-paying population and given over to the couple and their children in the form of tax breaks, school funding and other benefits. For their part, the couple make an implicit good faith agreement to remain bound in matrimony and to attempt to produce and responsibly raise any ensuing children. This simply has no parallel in fake homosexual marriage. No matter what they are called, same-sex unions are intrinsically unable to bring an equal value to the table in this regard, so there is absolutely no reason why society should be expected to provide these relationships with equal recognition and support.
If same-sex couples wish to hold private, extralegal commitment ceremonies and privately call themselves "married" that should be their right, but they, in turn, must respect my privacy rights and stay well out of my face about it, let alone expect the community at large to be forced to be an unwilling party to their private agreements.
Sadly, as part of the ongoing assault on our way of life as free and sovereign citizens under our Constitution, the forces of the "progressive" left have been attempting to diminish or kill the nuclear family and replace it with the nanny state. They denigrate and trivialize traditional marriage by attempting to reduce it to simply one of many "equally valid" hedonistic cum se cum sa relationships (if same-sex marriage, why not plural marriage, sibling marriage or even parents marrying their own grown children?). People born with their sexuality truly cross-wired are a very small percentage of the population, so what these people do privately really doesn't have much of an impact one way or another, but allowing them and their "cause" to used by the left to knock out the very foundation of civil society must not be allowed.
However, these fake marriages are mere pimples on the face of society compared to the cancer that is the out-of-wedlock production of children. Fatherless feral pavement primates produced outside of marriage are a bane to civil society. Society has a strong interest in promoting procreation only within the bonds of traditional enduring marriage.