If the person who has just died receives Last Rites and is Catholic, it means everything.
If the person who has just died receives Last Rites and is not Catholic, it means little, just words of prayer as the person meets his Maker.
Since said person is dead, it’s a little difficult to ask.
When the Mormons practice Baptism of the Dead, in their theology they are offering the deceased soul entrance into the Mormon Church (if I understand correctly). Prayers by a Catholic over a non-Catholic do no such thing. You cannot enter the Catholic Church after death. It’s too late.
If entering the Catholic church is not possible after death, what purpose do prayers for the dead serve?
Agreed. Just as the Mormons attempting to baptize a dead person into their church does little.