Right, to believe in a God, as the bible describes Him, including the flying throne, is foolish in your eyes. OK. Not like you have the slightest evidence for your incredulity. Of course.
Well you see, we don't really need evidence NOT to believe in something, rather we need evidence IN ORDER to believe in something.
I could say there are things like the flying spaghetti monster, or a teapot orbiting the earth, or faeries at the bottom of my garden, and you would not believe me, even though you have not the slightest evidence for your incredulity. That is a sensible approach.
So yes, to believe in a God, as the bible describes Him, including the flying throne, is foolish in my eyes.
(Especially since he is meant to be omnipotent, so why would he need a flying throne? He could just fly without. And since he is meant to be omnipresent, why would he need to fly anywhere anyway?)