IOW, just as I've been saying. Homeschooling, especially given the tools available to the modern homeschooler, is an excellent way for parents to give their kids the best possible educational opportunities. And no, parents don't have to know all the information being taught, also as I've explained multiple times. As for focus, given that the average homeschooled kid can get an entire day's worth of schoolwork done in just a few hours (less time wasted on classroom order), focus is less of a problem than you'd think. There is a lot of time wasted in the classroom just getting kids to sit down and shut up, while a homeschooled kid can work for a half hour until boredom sets in, go out and run around the house two or three times, then come back and do more with renewed focus. They can't do that kind of thing in a classroom.
Again, I will need sources for those claims. You seem to have a real problem with homeschooling, can you articulate why?