GREAT question. THANKS
1st. Keeep in mind that God’s ways are NOT mans ways.
Isaiah) 55:8-9"For my thoughts are not your thoughts: nor your ways my ways, saith the Lord. For as the heavens are exalted above the earth, so are my ways exalted above your ways, and my thoughts above your thoughts"
What God found acceptable TO God in the OT was overriden in the NT because of GRACE flowing through the Passion of Christ One time Perfect Sacrificet.
In the OT the sacrifices BY A PRIEST only “covered over sins”; but did not forgive them.**Lev.6:7 **“and the priest shall make atonement for him before the LORD, and he shall be forgiven for any of the things which one may do and thereby become guilty."
**They were forgiven eventhough their sins were ONLY covered over. And God accepted that less than PERFECT action of His OT priest **
Christ Instituted the Sacrament of Confession as the ONLY [normal] way He, God WOULD forgive sin in the NT because of GRACE. Romans 6:14 "For sin shall not [MEANS "ought not!] have dominion over you; for you are not under the law, but under grace."
Christ continues the use of HIS priest under the New Covenant as is most often essental to our salvation obligations for several reasons:
Its embarrasing to admit our faults to The Priest AND therefore GOOD for our humility’
Doing so is intended to lesson our desire to sin again, KNOWING that we must Confess them to His Priest
The Priest is trained to offer Spiritual advice on HOW to AVOID with God’s Grace, these sins again
We are ASSURED; Guarenteed forgiveness WHEN His Priest says “I ABSOLVE YOU IN THE NAME OF THE Father, The Son, and the Holy Ghoast” [NOT “I forgive you”]
John 20: 19-23 **
Now when it was late that same day, the first of the week, and the doors were shut, where the disciples were gathered together, for fear of the Jews, Jesus came and stood in the midst, and said to them: Peace be to you**. And when he had said this, he shewed them his hands and his side.
He said therefore to them again:
Peace be to you. As the Father hath sent me, I also send you.When he had said this,
he breathed on them; and he said to them: Receive ye the Holy Ghost. **Whose sins you shall **forgive, they are forgiven them; and whose sins you shall retain, they are retained
Take note that TWICE Jesus PROCLAIMS: "
[MY] PEACE TO YOU! This is highly signifiant because PEACE [our own inner peace is also the GOAL of the Sacrament of known forgivness! NOT GUESSING; NOT SIMPLY HOPING; BUT ACTUALLY KNOWING

THAT WE HAVE BEEN FORGIVEN.
[COLOR=“red”]The Cross made possible by the sheding of Christ Blood the POSSIBILITY-conditioanlly that our sins Could and WOULD be forgiven God’s way.