>'we already have laws about which people can get married. This is hardly an egregious extension of that power. The law is very plainly there to protect children.'
What you're advocating by disavowing the above, yet allowing the topic is to say you: "agree with authority when it happens to agree with my moral compass."
Sayinf "disagreeing with this is an extremely odd thing to argue," reveals the fact that the original intentions of the founders of this country (assuming you live in the States), as well as those of Enlightenment figures, that government is only legitimate whwn it is limited, is so odd and alienating to you makes me think that no wonder humanity always turns itself in to tyranny, over and over again.