I've read many posts discussing the method of creating a religion, or the way that a god gains the belief of people (Here's an example).
These discussions have caused me to wonder the why of gaining belief, not just the how.
In my plot, the relationship between human and "deities" is similar to that in Zelazny's Lord of Light.
Deities are not really omnipotent in this world, they just have advanced technology. These deities take advantage of humans and have methods to hide the truth.
I think that the deities will get into unnecessary trouble if they establish religion(s); people will know the existence of the deities, they may suspect that they are causing the bad consequences caused by their exploitative actions. If people know these deities are only normal life forms, and that they are responsible for their suffering, they may mount a resistance. Although the deities can suppress the technological advancements of humans, they would have to do more than just hide if the humans were aware of their activities! Thus, I think the simplest and easiest way for the deities to maintain their power is to hide their existence.
However, I still want to have religion in my story. Is there any reason for deities to take this risk and establish a religion? Or is my logic just wrong?