It cannot do so without a sincere desire to turn away from the past. Thus confession without true repentance is sham. The psalms also contain examples of confession. It seems to be human nature to be a bit lax about thanksgiving. Oh what a beautiful day, etc.
Thanksgiving is good manners.
We wouldn't dream of being ill-mannered and churlish in our dealings with others. It would not be proper to neglect the conventions of our daily lives. Partly it is respect that we show others as well as gratitude. Our offering on Sunday morning is known as a thankoffering and is usually accompanied by a hymn or prayer of thanksgiving. So we remain discreet and quiet in the face of God's embarrassing generosity.