Please note that this post is based entirely upon the most popular creation theory of TES, it is entirely possible that every word of it is wrong and that everything was created by a giant, bright purple elephant.
I'm relatively new to the forums but have been playing the TES series for four years, beginning with Oblivion when it came out. I am relatively knowledgeable on the topic of TES lore with my peers (and anyone I know personally) but I've been doing some more in depth research lately and have been questioning the sense of some of the in-game religions. We know that most mortals worship either a Daedra or the nine Aedra (well, if Talos counts). Then there are the DB who worship Sithis and consider the Night Mother a deity as well. There is one major problem with this, the Daedra and Aedra aren't the most powerful beings in existence, so why would people worship them as so. I speak, of course, of Anu and Padomay, the two primal forces. However, these simply being forces and not sapient beings it is understandable that people wouldn't worship them, so next in line is Sithis and Anuiel.
Why is it that so many people worship Daedra and Aedra and so few people actually worship the most powerful beings in the TES universe? Hell, the Champion of Cyrodiil defeats Jyggalag, a Daedra.