South African law does parents the freedom and right to home school. However just as the law allows  people to drive cars, how people drive (badly, intoxicated, without a licence, for example) needs to be monitored by government. When the government identifies and takes a drunk driver to court the drunk driver requires a defense attorney to defend their stance using an advanced knowledge of the law. Similarly because there is occasionally a conflict between the government and parents who home school, organisations like Pestalozzi become necessary to assist home schoolers with interpreting the law.