It happens that way all the time in the real world - I was disciplined (not beaten) and same with my children. Used way more words than physical punishment and was able to transfer to only words/discussions at very early ages.
I suppose those who have been abused might make a case, but the concept/principle is sound - for sane and moral people.
The existence of evil doesn't negate the principles of establishing a civil society.
The concept and principle are fundamentally unsound.
Children learn primarily by imitation.
By striking a child you teach - beyond anything your words can later undo - that your authority, and authority in general, is rooted in violence.
By striking your child you teach the lesson that violence is a solution to problems.
Unless you are willing to stand on that profoundly amoral principle, it’s time to come to terms with the fact that physical discipline is fundamentally uncivilized. The only legitimate use of force against a child is to protect them from imminent harm - full stop.