Does not mean what you think it means. Laicised means that certain promises are lifted and obligations relieved so that they return as if to the lay state.
But they are still a priest forever “in the line of melchizadek”-ps 110:4
In an emergency a “Laicised” priest still has to hear confessions.
They never WERE priests “after the order of Melchizedek”. That designation belongs to Christ alone. Catholic priests, if anything, share similarities with the Aaronic priesthood...which was SET ASIDE when Someone superior replaced it.
Follow Psalm 110 to Hebrews. All is explained.