If the education they were being compelled into was even on par with standard education in other developed countries then there would be a point in this discussion, but when we are talking about being compelled to get a 3rd rate education (at best) then there really is no point in the discussion or the law at all. Parents are largely to blame in general. Whether the kids are compelled into school or not, parental involvement still plays a huge role in a child's success or failure.
Interesting read.
https://www.businessweek.com/articles/2012-08-19/the-real-reason-americas-schools-stink
One should not ignore a problem because there are others. I agree that fundamental changes are needs in education. However that is no reason to go and make another mistake.