Indeed, it could, but it would feel truly bizarre for the humans to have special items/powers to counter daimonic religious spread. Despite the daimons and other invasion, BM remains a rather low-magic setting, where most things magic are rather limited. The Light, for example, only had 3 scattered temples. If every realm was to have one, it would have given quite a different tone to the universe. Of course, part of the struggle could be that the items required aren't in large enough numbers for every realm to have one.
My imagination isn't god-like, there can obviously be things I'm not thinking of. Story-wise, having the daimons turn the peasants into fanatical cultist armies would be interesting. Gameplay-wise, mechanics to counter this would either have to rely on too few people (priests) or too much magic (enough items/powers for most realm to somewhat limit daimonic mind control).
Why would it need to be magic? At the simplest Tom could create a new shrine type building that every noble meeting some requirement could build, which would limit daimon cultist spread. Or he could allow nobles to go all inquisition in a region and burn out daimon followers. Once you break the current systems limitations the options are endless.
