A building is never finished. The question is if the people are satisfied with a current status of being. Are they willing to restructure to a potential view. It’s a complex human effort with broad consensus. Bitcoin is far more complex and important than a cathedral. And just like the cathedral will never be “finished”. 
The question is how we got to this common effort. And that has come through a common belief. How do we bring a common belief or view into physical reality. That’s something we could learn from the church in general. Shock and awe from generations of proof of work. Leading by example in broad planetary competition.