Homeschooled people just assume others must be unhappy in those places where they dont go, but that is not the case and not shown in statistics.
Also, those people asking the question you find weird were asking about the experiences and kind of socialization that they consider big deal and was not going on in that place.
Prison?
As someone who was public schooled six years and homeschooled six years, public school definitely made me more unhappy, and was worse for me socially.
Of course, I wouldn’t assume everyone in my shoes would have the same experience. But it definitely cemented my positive opinion about homeschooling generally.