Parents shouldn't beat or rape their kids yet many thousands do. Parents should teach their kids about sex yet we still have sex ed in schools. Parents shouldn't deprive their kids of an education yet a minority do for religious our personal reasons; we still have compulsory schooling. Parents shouldn't give cigarretes or alcohol to kids yet we still have laws to prevent their sale to minors.

I'm always unsure what your sort of argument seems to imply. Kids are not property of their parents and the state routinely makes decisions about children's welfare.