Great that it worked for you, but I'm sorry, just because it worked for you doesn't mean it works for everyone.

Loneliness is not necessarily cured by seeing people. I've had times where I've seen close to 50 people I knew in a week and still felt lonely. In fact, there are times I've felt less lonely after having had a week alone. It isn't about contact with people, period, it's about a connection with people. And that often depends on the people you have around you. You had people that you got into contact with with whom you were able to build a connection with - great! Not everyone has that luxury. Some people have the luck that people around them generally aren't interested in them. Or suck the energy out of them. Or even act outright nasty to them. Then there are those where dealing with other people will make things worse due to untreated trauma. Some people are working their asses off and literally do not have any considerable amount of time for that. Or in my case, where I was in the psych ward and not having time and space to myself actually sent me on a downward spiral (and due to their way of thinking everyone needs the same thing, it took quite a bit to get them to change gears).

Everyone's situation is different. Otherwise I would be here telling you the only form of therapy that works is a day clinic, and that you shouldn't take any medication. In my case, it was true, but it very definitely doesn't apply to everyone.