Reading an article, and…a lightbulb blazes over my head. Okay, so maybe I’m stupid but I just - JUST NOW - realized there is a practical, scientific use for religion.
When ancient remains - particularly human and inorganic stuff like building/city ruins (I’m sure there’s a word for it but I can’t think of it) - are discovered, much is determined about the age and origin and societies involved with those remains based on known religious practices from various time periods. Sometimes religion provides some of the most important information which leads to further information.