Quite the opposite. I've known quite a few people in that position, but they have a choice to find other things to do. I genuinely don't believe many at all actually "want to" do things like the church coffee mornings, and would run for the hills to do something more exciting, but they do it because they'd otherwise be lonely.
One of my neighbours goes to the library every 2 to 3 days - she openly admits she's not that bothered about reading the books, it's mostly to get her out of the house, a purpose to get smartly dressed, etc., gives her an aim to motivate herself to finish reading a book so she can take it back and get another. When she's there, she may meet someone else she occasionally sees at the library for a chat, and has got friendly with a couple of the library assistants, it's also opened up more acquaintances she can chat to if she meets them on the street. That's a lot more fulfilling for her than an "it's raining again" small talk with a random shop assistant.
I've been there myself as a teenager, very lonely and depressed, suicidal at times, no friends (horrendous bullying at school), and I'd go out to, say, buy a record or pair of trainers, just for something to do, maybe a friendly chat, etc., and I'd without fail come back more depressed than ever. It was forcing myself to make "proper" friends, through hobbies & voluntary work, that got me through those dark days.