I do believe that a lot of religions kinda made sense in the past to underline laws and start building a cohesise society. In a sense the old testament is a book of laws with just a lot of fluff. And while a lot of it aged badly, you can see how a lot of rules made sense at the time (e.g. food safety). I do believe that this was the original purpose of this. To strenghten the belief in laws by adding a mystical component on top of them for people who weren't as firm with written laws and a believe in a justice system.

These days, of course, it's archaic and unnessary.