With churches, there are a few problems that are intellectually repellent, meaning they won't solve for certain personality types.
Namely:
1. artificial social heirarchy
2. magical thinking
3. group think
4. rules without reason
Part of religion is often about imposing order on the irrational aspects of experience and reality, but there's a lot of centuries-old cruft and inertia behind the ones that exist.
When you take apart any given religion, and inspect individual parts, and place those parts within the context of a small, insular village, dispossessed of plumbing, medicine or indoor heating, any single part starts to make sense. But many are far, far away from that, and need not invest in superstition.
Morality is great, but in some cases morality without purpose translates to overbearing fear imposed with motive.
Mythology and folklore are good for illustrating practical principles and relationships between ideas, but some people refuse to consider whether the ant and the grasshopper never actually happened.
All this taken together, often tips the scales toward cognitive dissonance for some who think too deeply about bald facts. I don't have a solution to fix this, but I've seen what happens when smart people try to reimagine a modern religion that might fit current scenarios, and it's usually equally terrible.
Someone will eventually figure this modern community rationale problem out, but it's not something you can just fake or make up for its own sake. It's something that needs to (seem to) happen organically, on its own, and remain authentic. Sounds pretty difficult if you ask me.