People who are actually "alone" are also those that end up developing mental health issues due to said loneliness. The average person can feel levels of loneliness, but not to the extent an Incel does. Normies remind me of dogs, you leave them alone for several hours while you go out, they can get depressed a lonesome, but they also know their owner will come back and all of a sudden the dog becomes excited. That's the typical normie, they have enough people around them that loneliness and sadness are barely part of their emotion patterns on the daily.
I have also noticed, as I've become absolutely isolated more and more over the years, my desire for human contact is almost non-existent. I believe this is when most of become "doomed" to our own-selves. It's a switch that, once flipped, can never be undone. True loneliness fucks with your brain and many of us have fallen through the cracks, there's no hope of recovery. I can only hope I die young, because I ain't fucking living here for another decade.