People are most attracted to attractive people. (And by "attractive" I mean primarily personality characteristics.) Most people seem to actually have an aversion to lonely people whether conscious or subconscious. Perhaps it's an old social defense mechanism from times in our history where it was dangerous to associate with unpopular people. You were more likely to be shunned as well and less likely to be given mating opportunities.
I often go out of my way to talk to the wall flowers and shy people that no one is talking to, but I've found by and large, they are also much harder to talk to! It's much more work to stoke the conversation, and we all know there's a threshold there, below which, the conversation just isn't stable. Putting two wall flowers together has a much lower conversational success rate (which is a basic minimum hurdle to continuing any kind of social relationship) than two social people.
It's a tough nut to crack, and I don't think unknown intentions is the problem.