Saying "I'm sorry" is something anyone can do. Sorry doesn't require change, only an acknowledgement that you messed up. Sorry is a way out of a problem, not the beginning of a new path. Sorry doesn't require the power of God. If you will forgive the pun, “I’m sorry” is a sorry pretender to the biblical response “I repent” when sin is committed. The Holy Spirit makes this sharp distinction between repentance and its worldly alternatives. It is the difference between life and death. Note well the wonderful promise of Paul's words in 2 Corinthians 7:10:
Godly sorrow brings repentance that leads to salvation and leaves no regret, but worldly sorrow brings death.
One reason that the presentation of the gospel is absent in parenting is because calling for repentance is not a common part of parents' day-to-day conversations with their children.