There is also the fact that in the Nentir Vale, the gods that make up the current pantheon are the survivors of the Dawn War, and so they all have combat abilities and such. The "weak" gods (as in, combat weak) didn't survived the Dawn War.
We have explicit mentions of such instances, like the God of the Word being among the first casualties of the war. The gods of harvest and the hearth, and that stuff, may have shared the same fate.
On topic, I'm wondering, isn't
Rao the god of Krypton in the Superman comics?