I think most people who are homeschooling have more than one reason for doing so. Religious reasons factor into our decision but are only a part of it. Take a look at the "why do you homeschool?" post below and you'll find many different responses as to why many of us chose to homeschool.
+adamwife+:Religion is one of the many reasons we made the decision to homeschool, but it's certainly not the only reason. We do use a Christian curriculum called My Father's World and the focus of our studies is Christ-centered.