I had an extreme bout with loneliness, come to think of it, a couple of years, ago, resulting from an isolated experience, and it was quite intense. But, that has nothing to do with the article, or topic at hand. (I was compelled to mention, since, I had mentioned I don't become lonely).
There is a point that the author touched on, which I do find true for myself. I experience rushes of endorphin secretion, during and after I have spent time on WP. I even have oxytocin rushes, from spending time, here, depending on the nature of my interactions, at the time. So, I do agree to the extent, that there are health benefits from socializing, as the afformentioned absolutely, contribute to a persons mental and physical health. Although, I can only speak for myself, and I know I don't possess some of the more common traits of Autism, which goes back to the depth/intensity that I experience emotions and empathy. Perhaps, I am way off topic, now, however.