Why don't more parents homeschool?

Sara Hoyt has a good post on public education.  In Malice or Incompetence? Sarah points out how our government schools have become places where children are being taught not to read.  She starts with:

----------
Recently I came across a news article estimating that 80% of NYC graduates cannot read and write and are functionally illiterate. I’d bet those numbers are not far off across the country, and it wasn’t a surprise. What was a surprise was what my son told me when I discussed the matter with him.
----------

It is so sad. It is hard to imagine that 80% are functionally illiterate.