that is more of a meta question on why 'religion' existed in the first place.
and has many good answers.
most of civilization emerged due to STEM, minus the basis for the science.
religion offered psychological completion for things weakly understood. usually in the form of something humanly familiar, an all-knowing and protective but disciplinary father figure(s).

so why do religions persist so deeply, when we have the greatest number of educated people in history?
that is more wiggly.
- still many undereducated and disinterested people
- disproportionate power and influence by the entrenched
...
near the bottom of the list, science's deepest understanding of reality is quite unsatisfying to those few interested. it is non-intuitive to humanity's collective experience.
if one cannot live with that, options such as 'christian science' emerge.

sidenote: another advantage of (current) AI, is that it can easily accept deep science that is very non-intuitive to us. but i am skeptical whether it can meaningfully improve\displace new human concepts of such.
but if\when AI can, should we be excited and afraid? maybe start a new religion despite a truly indifferent figurehead, as sci-fi has much anticipated ?