Parental authority stands on two conditions: 1) the parent’s actual possession of superior knowledge of the child’s needs, and 2) the parent’s intention to apply that knowledge to benefit the child.
Parents sometimes use coercion outside of parental authority, often for the sake of the smooth operation of the household. This in itself is not illegitimate. The problems start when coercion is confused with authority. The primary perpetrators of this are those who actually do not know the difference, and therefore lack authority.