I agree with the other posters.
You must say your sins.
Notice the story of the Prodigal Son…he “got his sins” out before the father forgave him.
Think of “Reconciliation” in the big.
Through reconciliation, we are “reconciling” a lot of things.
We’re not just reconciling with God through the priest.
We’re reconciling with the Church
But, crucially, we’re also reconciling our will, with our intellect, with our body.
Having to put words to our sins is an act of the intellect. And it can’t be done unless the “will” moves you to get to confession…and your body has to follow/obey your will/intellect.
So there’s a lot more happening at Confession than most people realize.