No society on earth that I know of has ever achieved this, and I'm pretty sure it's usually felt that one can't have an obligation to do something impossible.
Ok, now you're not even trying to argue in good faith. In fact I'm pretty sure that if the sexual analogy had never been brought up, you'd be arguing some variant of "just because things will never be perfect doesn't mean we shouldn't try to make them as good as possible".
On the face of it, the International Covenant thing you linked to contradicts that, but I'm pretty sure it's (1) intended aspirationally, as if it were proclaiming a right to happiness or a right to good health rather than a right to work,
So how is this relevant to the argument at hand? I'm sure advencedatheist's comments were also aspirational in this sense.
(2) primarily aimed at measures whereby people try to stop one another working -- e.g., discrimination where some racial or cultural group is systematically unable to find jobs.
Sort of like how low status nerds are systematically unable to find sexual relationships?
now you're not even trying to argue in good faith
This is at least the second time you have thrown such an accusation at me [EDITED to clarify: the other time was in a different discussion; I'm not saying you've done it twice in this thread]. I promise it's wrong, at least as far as my conscious purposes go (who knows what might be going on underneath?). It would be good to debug what's going wrong here -- am I missing something that's so obvious to you that you can't imagine someone could honestly miss it? are you completely misinterpreting me? etc. so ...
Speaking from personal experience, finding the right relationship can be HARD. I recently came across a rational take on finding relationship partners, much of which really resonated with my experiences:
http://waitbutwhy.com/2014/02/pick-life-partner.html
http://waitbutwhy.com/2014/02/pick-life-partner-part-2.html
(I'm still working my way through the Sequences, and lw has more than eight thousand articles with "relationship" in them. I'm not promising the linked articles include unique information)