If what you really mean is why bring the topic up, it’s because the healing of the molested son was brought up.
What the father did will not bring the son any closer to healing, nor will affirmation of it by the son bring the son any closer to healing.
God is quite clear not to fear those who “can kill the body but after that do no more” but “Him who can destroy both body and soul in hell.”
Hell is a simple consequence of choosing a certain way to live, which all mankind has already chosen in the original sin. We already became God’s enemies. Jesus is a second chance.
....”What the father did will not bring the son any closer to healing”....
Sure it will...just ask any kid who ‘didn’t’ have parents stop their abuse.
Sounds like the father saved his son, and who’s to say the bruising wasn’t God rendering justice on the pervert?