To prove that we're domestic partners for insurance would require documentation of at least 6 different things (not of all which are needed for marriage). If the state acknowledged our relationship or even acknowledged domestic partnership, we'd only have to submit one document.
I do have to acknowledge that they are not discriminating on any basis besides legal marriage and they're obviously not excluding anyone based on that. I understand the need to document it, but it's not the same as for married couples. And if one more person writes about how easy it is to get a marriage license, I might puke.