I have to disagree with your position that home schooled children miss out on many of the things government schooled children get to experience. Being a home school family, we have a little more insight on this than you seem to have.
That being said, I do want to mention that I think it is extremely dangerous for a JW family to home school. Oh my goodness, JW kids are already insulated from quite a bit when they do attend government school, but keep them home 24/7 and you have a recipe for disaster. I just shudder to think of the kids being at home, learning from God-knows-what resources, going out only to attend meetings, door knocking, or a fast food restaurant, or possibly getting together with another JW friend if they're lucky. I just want to cry.
Being born and raised a JW, my only salvation from a strict home life was being at school and seeing how other people functioned. I hated being a JW and wanted to escape at a young age but only managed to do it at the age of 18, of course losing the support and contact of family and friends. I relied on strangers for help and support. Nice, huh?
Anyway, back to the topic at hand: many people do not have a clue as to the rich educational and social opportunities home schoolers have available to them, or how colleges and universities actively search out home schoolers because they are well rounded.
Yes, there are the occasional stories of neglect, but the vast majority of parents that educate their children at home have their best interests at heart and do everything in their power to provide what their children need, including finding ways to get help for subjects that may be beyond them (think calculus, trig, sciences, etc.--which can be done at community college during high school years). Thank God for local home school support groups and state networks!