Every time I hear this (my dad is a firm believer, for example, not you, parent commenter), I just ask if we have the same definition of "fine," because we're talking about whether it's OK to hit a child with a stick and they've taken "pro," so I'm not sure we do.

If it's not OK to hit an adult with a stick, it's not OK to hit a child with a stick! And it boggles my mind that this requires explanation.