I do agree with the first part. I once spent an entire year alone in my apartment, never speaking to anyone and rarely even going outside except to get groceries and go to the family Christmas get-together. It was heaven, but it couldn't last because my money wouldn't last, and so I returned to the job force. My need for money outweighs the draining effect other people have on me.
However, I can't speak to the second part because I don't understand "loneliness", since I've never felt it (at least I don't think I have).
Loneliness can be compared to other withdrawal symptoms. People that are used to and expect a lot of social interaction enter a negative mental state to being without it.
When you don't find the social contact addicting, and do not engage in it much, you never are exposed to the "withdrawal" symptoms.
However, I can't speak to the second part because I don't understand "loneliness", since I've never felt it (at least I don't think I have).