As an assistant in the creation of humans, Epimetheus' understanding of faith had become profoundly deep. Indeed, this power could swiftly help deities amass Divine Power, and even break the ceiling of Godhood if the flow of faith was constant. However, the prerequisite was that you had to possess Godhood.
At the very least, you had to be a quasi-god like a territorial god, possessing a 'territory' similar to Godhood. Without such a medium, directly absorbing the Power of Faith would be akin to courting death. It would be like touching the Origin of Godhood itself; going mad would already be the best outcome.
Of course, ordinary beings are also unable to perceive faith, only those who are naturally divine or who have gathered it on their own. The latter does not exist in this world yet, and the former are all descendants of quasi-gods or gods. An existence like Pandora is actually extremely rare.