> Why are we protecting criminals, just because they are minors? Protect victims, not criminals.

Protect victims and criminals. Protect victims from the harm done to them by criminals, but also protect criminals from excessive, or, as one might say, cruel and unusual punishment. Just because someone has a criminal record doesn't mean that anything that is done to them is fair game. Society can, and should, decide on an appropriate extent of punishment, and not exceed that.