Well, I have no belief in any invisible magic guys up in the sky but don´t hate those delusions. People believe all sorts of nonsense, that´s their choice.
It is their choice, but it
directly affects their credibility.
If you loan me 1 btc, you know for a fact you will get 1 btc back, for you are dealing with me and me alone.
If I loan some religious nut job 1 btc, nothing is stopping them from having a dream where their god commands the repayment would better be spent on this or that.
You cannot count on the word of a cult member!