Comparative advantage doesn't apply to things you can't trade; if I am good at (say) physics but mediocre at mating and you're mediocre at physics but good at mating, there's no way I can give you one unit of physics in exchange of one unit of mating. IOW, what ThrustVectoring said.

I obviously am not saying you can trade "mating." However, you can get relationship advice from other sources. I'm surprised that you don't understand the distinction.

Less Wrong folks tend to be good at writing and thinking about some things, like Newcomb's problem, epistemic rationality, and decision theories, and not terribly good at giving advice in other areas. Less Wrong is, if anything, a bit on the left side of the bell curve of social intelligence. It doesn't make sense for Less Wrong to try to specialize in relationship advice any more than it makes sense for us to start writing posts about auto repair or body building. There are other places for those topics. Less Wrong isn't the only place to try to talk about these things, and we aren't the best people to advise or seek advice from on many topics.