I'm not sure where you see disagreement. It's not a personal sin for the priest to be dismissed. See #3, by request. Oh sure, a priest may be dismissed as a penalty, for something he did, namely sins such as abuse, but the dismissal itself is not sinful like procuring a divorce. The OP compared laicization to a divorce, and it's nothing like that at all.

Think of it this way: it's not a crime to go to prison, but one will certainly go to prison as the result of a crime.