This article, by one of my favorite writers (and yes, she's a published author - she's best known for her Little House series books about Laura's grandmother and others), will heretofore be referred to as "My absolute favoritist (Rose's word) all-time best read on arguments against homeschooling".
It's so well written. She doesn't attack 'school' but instead gives real answers to those questions that we, as homeschoolers, get soooo very often. Go read it. If you're a homeschooler, you'll shout hip-hip-hooray at the end. If you're not a homeschooler, you will have a new perspective on homeschooling...and, it might just be an even better one than you have now. ;)