Yes, I am well aware of once validly baptized always baptized. However there are other aspects of the rite of baptism that should be finished and the Rite of Baptism includes and makes provisions for that.
In the case of the laicized priest, I was speaking from a practical point of view that if someone is that bad off that they can’t wait for a Priest in good standing, and the only other option at hand is for a laicized Priest chances are good the situation is so dire that for the sake of time, general absolution would be given. As with all cases of general absolution, should the emergency pass, and the recipient is able to go to the Sacrament of Reconciliation, then that person has the obligation to go and confess those sins and receive the full grace that accompanies that Sacrament.