I only have anecdotal evidence of what homeschooled people are like. I'm sure there's a ton of nuance and some homeschooled children are probably taught by extremely intelligent, capable parents and some homeschooled children are probably taught by people who are barely even qualified to be a parent much less a teacher.
That being said... Every homeschooled person I've ever met has been what can only be described as "off". These people become adults with very skewed social skills and even worse, their sense of humor is completely stunted. I think a well-rounded person needs to be exposed to the rest of the world and the people in it starting from kindergarten, and homeschooling cannot reproduce that.