Just like public schooling, home school sometimes produces a successful student and sometimes it does not. The difference is that, with home schooling, the state is not in charge. It is certainly true that some parents, JWs, use the homeschool route to keep kids isolated, and that is not a good thing. On the other hand, a concerned, dedicated parent can be a successful homeschooler, JW or not. I homeschooled my kids when we were all still JWs, and this at a time when most JWs looked down on the practice. "You are abandoning your natural preaching territory, the classroom," was a typical reaction.
I began when my two boys were preschoolers. I wanted to be intimately involved in teaching them, not turn them over to the state for its own peculiar brand of indoctrination. Just so they would understand what they were 'missing' by not going to 'regular school', each of them did attend one or two years of public school. They went right in at grade level and were 'A' students. When they got to the high school level, my public school district had a program for independent study. We took advantage of that, and my sons even attended algebra and geometry classes at the high school. They both have state recognized diplomas.
My real educational regret is not home school. I enjoyed it and they did too. My regret is that I did nothing to encourage these bright youngsters to go to college. That I blame on the WTS, although I must also accept responsibility. But, I am trying to set a good example now. I myself am about to complete the requirements for my AA, and I will be going on to transfer to a four year university. My no-longer-a-JW son wants to try a few college classes, if he can get his job situation arranged. MY still-a-JW son has done well in his chosen field of employment, and currently is training in a technical field, on the job.
Home school worked for us. If we had not had the millstone of the WTS policies around our necks, it would have worked even better.