Well it won't be useful for making glass eyed 'we found truth' cult because it'd actually kill the confidence, in the Dunning-Kruger way where more competent are less confident.

The guys here haven't even wondered how exactly do you 'propagate' when A is evidence for B and B is evidence for C and C is evidence for A (or when you only see a piece of cycle, or several cycles intersecting). Or when there's unknown nodes. Or what happens out of the nodes that were added based on reachability or importance or selected to be good for the wallet of dear leader. Or how badly it breaks if some updates are onto wrong nodes. Or how badly it breaks when you ought to update on something outside the (known)graph but pick closest-looking something inside. Or how low the likelihood of correctness gets when there's some likelihood of such errors. Or how difficult it is to ensure sane behaviour on partial graphs. Or how all kinds of sloppiness break the system entirely making it arrive at superfluous very high and very low probabilities.

People go into such stuff for immediate rewards - now i feel smarter than others kind of stuff.