The problem is I've seen the "socialization" public school has to offer from the administrators and the unattended brats left to their own devices by disinterested, indulging parents. If my kids never encounter anybody at all it is better than the product I've seen produced by the public education system.
But now that my son is a teenager, all the comments have changed.
Now people asked how we managed to get a teenager that seems truly interested in people of all ages. They note how he can carry on a conversation with adults, but is not above playing with the younger children in the group.
I didn't instruct him in these things, I believe it is a direct result of homeschooling, and removing him from a "peer" dominated environment.
He never learned it was "not cool" to carry on conversations with adults, or play with and entertain cranky 3 year olds.