One could argue that legalizing gay marriage and marijuana are conservative standpoints as that means less government limitations on your personal life.
You would think.
It’s a libertarian standpoint. Liberals can love it because civil rights and conservatives can love it because government bad.
And technically the libertarian POV would be that the government doesn’t recognize any marriages at all, which I can sympathize with but it leads to a huge rat’s nest of legal issues, so government recognition of family units in some capacity seems warranted to keep that side of things simpler. But I don’t see any reason why that can’t be extended to unmarried multi-generational family units, etc.