That I suggest is not socialization, but anti-socialiazation. That is not to say all is perfect, but it is better than having 20-30 kids in one classroom all the same age. Most home schoolers are involved in outside activities and have friends so that their is plenty of time for socialization with peers. I really think boredom is a learned thing. I don't think it is the natural state of childhood.
Children are naturally curious and busy exploring.
Any time my boys say 'I'm Bored' my answer is that they are not using their brains to think of something to do. Don't get me wrong. There are times when all of us need some down time. That isn't boredom. I think our society sometimes pushes children into so many activities that they don't know how to structure their own time so when nothing is planned they don't know what to do.