That's not the conclusion I'd draw from that body of evidence.
It can be a simple chain of logic saying: % of children try to test their boundaries. Of those children some get away with it, some don't. Of those who get away with it, they carry on doing it, and it has reprecussions down the line. If you look at the problem this way, it's a rational take on caning - to tighten the net against bullying.
Posted more context here:
For the record, bullying is a complex problem to solve, and no nation or policy or tactic has the silver bullet.