> If it's an illness (BPD), suggesting there's enjoyment indicates belief that the intent of the sufferer is malicious. I don't believe this is the case. A disorder comes from negative experiences.

Well, we are also hardwired to like chocolate, but if we eat too much of it, then it becomes a disorder.

I was imprecise about the word "enjoyment". What I meant was simply attainment of reward signals. But reward signals do not necessarily imply happiness. At minimum they shape what feels like the right thing to do. At maximum they cause euphoria. E.g. a person with obsessive-compulsive disorder will repeat the same sequence of actions, say, 100 times a day, and each time it will feel like the right thing to do, but such a person will not find much enjoyment.

I suspect that in neurotypical people, the processing of social information (dominance relations, social status, norms, nurture, grooming, communication, gossiping etc.), always feels like the right thing to do, from birth onward, so their neuronal circuits are finely attuned to computations in that domain.

In the absence of such reward signals, the circuits are not trained for such things, and what remains is epistemic circuitry: Building models of the world by approximating/predicting how it works based on accumulated information.

(All of this ignores, of course, the entire neuroscience literature on this topic, which identified e.g. differences in synaptic density in people with ASD; though perhaps the increased value of non-social things comes from more circuits doing epistemic computation, but I'm just shooting in the dark really…)