I don't know about this. I understand the reasoning, but I wonder if it is right. It brings to mind the anecdotal story ( and I don't know who to attribute it to) of a church leader who was known to say, I love the smell of cigarette smoke in the chapel! I take it mean, that instead of holding the attitude of inappropriateness or offence, he was delighted that such an individual was responding to the desire to be there, vices and all. Growing up there was such a man in our ward that attended sacrament service fairly often. As a kid I remember the strong smell of cigarette smoke on him and thinking to myself, "what is he doing here?" As far as I know, he never held any callings or made temple covenant. But he showed up.
Is an all-or-nothing approach all there is? Is our message to this community, "Know we love you, we pray for you, we strive to treat every soul with fairness and dignity, but unfortunately, unless you make drastic changes to your behavior and lives, you simply cannot obtain the fulness of the Gospel through its sacraments and ordinances; therefore, we really have nothing to offer you within these walls." I don't know that that is right.
Now as CB has mentioned, not many LGBQT couples even have a desire to attend LDS services and I fully understand that. But perhaps having some couples "showing up" is needed to help us mature our hearts; as that young Senator needed, in regards to the smoky man sitting next to him. And maybe showing up is all they can offer.