Well since 10s of thousands is so tiny compared to 100s of millions of children who would be adversely affected as the core of society(marriage) itself shifted our mores so radically as to institutionalize fatherless sons and motherless daughters, your argument is one of numbers.
But how would denying gay marriage keep gays and lesbians from having kids? SSM has nothing do with the gender of parents. As one doesn't need to be married to have children.
So denying same sex marriage has *nothing* to do with 'fatherless daughters' and the like. Lesbians have been having kids for decades without SSM. Denying same sex marriage now won't magically insure that no lesbian ever has a child again.
Your 'cause' (denying gay marriage) doesn't have a thing to do with your effect ('fatherless daughters'). Meaning that your proposal is again, worthless. It produces no societal benefit to any child.
So your numbers are zero.
Meanwhile, your proposal hurts tens of thousands of children. The immediate legal harm that Justice Kennedy goes into in detail:
Windsor v. US said:
And it humiliates tens of thousands of children now being raised by same-sex couples. The law in question makes it even more difficult for the children to understand the integrity and closeness of their own family and its concord with other families in their community and in their daily lives..
....DOMA also brings financial harm to children of same-sex couples. It raises the cost of health care for families by taxing health benefits provided by employers to their workers’ same-sex spouses. And it denies or reduces benefits allowed to families upon the loss of a spouse and parent, benefits that are an integral part of family security.
So your proposal does nothing but harm children. And it helps no child. Here then is the score card of denying same sex marriage:
Children who benefit from denial of SSM:
0.0
Children who are harmed by denial of SSM:
10s of thousands.
The inverse is still worse for you:
Children who benefit from recognition of SSM:
10s of thousands
Children who are harmed by recognition of SSM:
0
Once again, by your own standards, your argument loses by the numbers.
As it only hurts kids. And benefits no one.
So, properly, this isn't an argument about existing kids in their unfortunate situations. It is about the institution into the future. And that radical change you propose: fatherless sons and motherless daughters as the new core of society, stands to harm many many more children than just 10s of thousands. Indeed it stands to harm the core of society itself over time in such a way that we cannot tolerate it.
Properly the debate is about all the children you will be hurting today. AND all the children you will be hurting in the future. As remember, the children of same sex parents whose parents aren't allowed to marry will receive as deep and severe a harm in the future as kids today are now.
Denying SSM doesn't help any child. As gays and lesbians will still have kids. Your proposal only guarantees that these children can't have married parents.
Denying SSM hurts tens of thousands of children. See the Supreme Court ruling above. Now, and more in the future.
Your proposals helps no one. And hurts tens of thousands of children. No thank you.