Well, not only do I know a lot of homeschooled children, but I know a lot of their parents as well - and they've made great sacrifices to homeschool their children. Living on one income & doing without a lot of things, I might add that none of the ones I know are arrogant in any way. They work hard to do what they think is best for their children.
Homeschooled parents can "go to hell"??? That's a damn fine attitude you got there.
I have seen the "I-can-do-it-better" attitude in almost all aspects of homeschoolers' lives. This confidence could be taken as arrogance, although it is a stretch. Among some of my friends, this misplaced confidence has created problems, often expensive to fix.
However, in their children's education, this attitude is fine. A dedicated, caring, untrained parent can educate a small number of children better than a trained teacher who does not have the same concern for the child and has to deal with 20-30 of them. As a university professor, I would take a homeschooled student over a student from a public school anytime. I have found homeschool students uniformly to have better attitudes, better study habits, and are at least as well-prepared academically.
If Humblegunner doesn't like homeschooling, he doesn't have to homeschool his children. I would assume on this forum that he would at least respect the rights of others to do what they feel is best for them and their family.