Adult caning is done by trained professionals. https://transformativejusticecollective.org/2023/10/20/getti...
School caning is with a lighter stick and through clothing, so it will be less severe, but the reduction in severity will probably vary a lot with the person administering the punishment.
Trained Professionals -> Goons exercising the states monopoly on force. Ftfy.
You'll notice that my carefully chosen link does not look favorably upon this practice, but that doesn't mean that these people aren't paid to do a job that they've been trained to do with some consistency, unlike school officials.