Well, it does not require the additional ingredients of mystic entities to which powers are attributed when those same powers in other corcumstances are found to be frequently demonstrated without those entities. For example, individuals have healed themselves of serious physical ailments because they read a newspaper article validating the efficacy of a drug they believed they were taking. Quite mysterious thing, generally called the placebo effect. But the thing about the placebo effect is that it can be triggered by any number of different significances. Finding Jesus is one of them. So is believing another cares for your well-being; so is a self-determined decision to recover. The trigger "symbol" varies wildly but the consistent element in the case histories is that the individual recovered from something without physical reason.

That's the simplicity of it -- the mind, correctly activated, can relieve distress and/or illness.

Taking that phenomenon and adding a whole bunch of material about the nature of Jesus is adding complexity, because the common elements are not centered around Jesus but around "some trigger to the mind" -- indicating it is thinking about "Jesus" or something comparable, not the substance itself.

Additionally your model requires that you postulate the long extension of positive affect by an entity who died many centuries back. This makes the proposition (as you said above) unprovable. There are of course millions of people about whom it can be said that they died long ago, and maybe a score or a hundred of them who claimed divinity, some of whom were probably used in ages past as comparable triggers for what is actually an act of self-elevation. So far I have seen no argument of merit for adding all that complexity into the picture.

A