This is fundamentally a lore/RP question, but I sense the answer may involve combat balancing or other outside issues so I'm writing here.
Lord Tecton posted in a previous question
that the priest's blessings currently scale like this:
Characters with the Healing ability: 100%
Targossasians/Allies of Targossas: 66%
Everyone else: 0%
I've always thought that the Healing Skill involved directly manipulating the elements (along with the Spirit), and was consequently outside of the Bloodsworn Gods' domain. Because of this, the Church/Targossas imposed strict punishments for blessing Evil and Chaotic adventurers, as they might use their blessings in a way that threatens Creation. I feel that the significance of blessings and their distribution considerably weakens when blessings cannot affect individuals unallied with Targossas anyway.
Is there a specific reason for this? I'll probably ask around IG for an explanation, but if there's a straightforward answer why priest blessing effectiveness has been written into the game code, I would love to hear it.
For balance reasons, I could see Priests gaining a larger benefit from blessings than other classes, something like:
Characters with the Healing Skill: 100%
Everyone else: 66%
That would keep the currently-established protection values the same as they are now, while also producing a real consequence if a priest blesses someone unallied with Targossas.