There is no question that tests are terrible, are gamed, and get in the way of actual learning. How to replace them with something better and still measure performance is an open question.
However I think the biggest benefits of homeschooling are being ale to get customized 1 on 1 attention, and learning how to learn. That is the meta skill of being self driven, self disciplined in acquiring new skills. A lot of people that go through the public school system seem afraid of that or unable to do that. They were the people most likely to wash out of college in the first year, because they couldn't deal with the relative lack of structure compared to high school.
However I think the biggest benefits of homeschooling are being ale to get customized 1 on 1 attention, and learning how to learn. That is the meta skill of being self driven, self disciplined in acquiring new skills. A lot of people that go through the public school system seem afraid of that or unable to do that. They were the people most likely to wash out of college in the first year, because they couldn't deal with the relative lack of structure compared to high school.