"god exists" <Why is this a relevant argument?

[TruthWorthy]

I thought that logical statements had to assert that one thing meant another (in a manner of speaking).
ie. snow is white; Tiberius is a man.
This isn't the case with "god exists", or "god is true" as they are self reflexive statements, such as "truth is true", they don't propose anything actually interacts with the subject besides the subject. Better would be "god is a cloud", then you can add other logical statements, such as "clouds are rain", then adding: "god is rain".
I can't see how "god exists (or "god is true")", counts for a standing argument/logical statement/sentence.