I am unsure if you are on the same track as myself.
Committed, caring and loyal relationships that are given legal status and rights by means of a civil union are not marriage relationships. therefore they are not intrinsically about sexual acts.
Just as adoption is not about sex. God-parent relationships are not about sex. Continental relationships of patronage are not about sex, guilds/apprentice-ships are not about sex, fealty vows are not about sex. Tolerated remarriages for the sake of the children are not about sex.
But they are all institutions for creating legal caring “families” and doing their best in an imperfect world. That is a good thing despite the imperfections in every familial situation.
What the possible blessing of such worthy affine relationships has to do with formally and obstinately denying the Church’s teaching on the disordered nature of homosexual acts, fellatio, mutual mast., warfare, fornication, incest etc etc that may happen in any family relationships I really do not see.
What i should have said, and i apologize for giving you that comment, which basically did nothing but confuse the heck out of you and didn’t help my case, which i also would like to detract, is something different.
The question is, what does this blessing signify? Acceptance of their lifestyle?
Yes, this is really where the discussion needs to go methinks.