Hello Johnny-come-lately. Let me point out in particular one thing that you said...
The point is that the gap between our limited understanding of reality and Ultimate Reality is infinite, and thus is an extremely powerful argument for the possibility of God's existence.
How does this make my statement nonsensical? And how is your statement sensical? You are echoing what is said too often: If we don't know stuff, there must be a God. Well let's look at dogs, they are far less intelligent than us, thats an even more powerful piece of evidence. Lack of knowledge does not necessitate supreme knowledge.
You are asking us to accept something that collapses under its own weight - ie, "If we don't know stuff, there must be no God." Do you see the problem? Why would anyone conclude that's the end of the story? The awareness of a huge lack of knowledge begs further inquiry, not less.