Yeah it seems ridiculous now that I’ve deconverted and can finally look at this critically from the outside. It would be like raising a kid by leaving them a letter. If the god existed surely they would have the bright idea to drop some updated material every few decades and maybe make the occasional clarifying announcement to humanity.
Having a collection of religious texts, physically recorded by human hands, that provide information about the religion is a feature consistent with any religion that has a human-fabricated deity. Coincidentally, it is also a feature of every major religion. 🤔