I think it is should be careful not to conflate homeschooling with un-schooling. They are not the same. Un-schooling the parent does nothing active really and the kid just lives life and odes what interests them.
I know a good bit of homeschoolers and helped several myself in terms of college applications. Every one of the were in the 1% or better of SAT scores, all attend or attended top 10, mostly top 5, universities and colleges and so far there are in top 3 business schools and law schools. So I am biased, I think it is a good thing, if parents know how to do it.