To be honest, I don't think we're actually that bad at it. Just because we have weak and hence can't interpret well the bonds between people doesn't mean we can't give good advice about what one should do.
Rather than give situational advice like "well, he's clearly attracted to you, so I think it would be best if you tell him what you make of him", which would require a confidence in , we can a hypothetical situation on the basis of "well, if x is the case, do y, but if q is the case, then do p". This way, we are making no judgements about bonds between different individuals, but are simply giving different methods to follow. Obviously there's a bit of in there to compensate for (following a method: x → y), but basically, we're not entirely helpless when it comes to these situations. Also, we can talk about different values, such as honesty, without the need for . Suggesting that someone be honest with their partner requires little or no skill concerning actual relations.
What do you guys reckon?