Huh?
So... theology doesn't address questions such as how to build relationships with the gods, methods of worshiping the gods, attributes of the gods, and other various matters about the gods?
It certainly tries to. However, until the basic existence of a god has been established, anything that relies on the existence of that god (e.g. opinions about the god's attributes) is just navel-gazing, not based on anything.
It's not exactly a unique situation. There are "disciplines" related to all sorts of things based on nothing of substance: homeopathy, reiki, dowsing, etc.Interesting. One must wonder how theology as a discipline came to exist, then. And yet it does. How did that happen?
As far as theology goes, you only need to take a few unfounded premises as given to have all sorts of arcane implications that can be explored. You can see something similar when you ask sci fi fans whether the USS Enterprise or a Star Destroyer would win in a fight.