I had a lengthy argument with Shiranui about the Semi-Arian compromise-concept of "Similar substance" which is much different than "Same substance". Indeed, they have a "Similar" substance, but what that exactly means is up to dispute.
I'm not quite sure why you think numerical superiority has anything to do with God arbitrating between you and I personally. Besides, very few of those 1.2 billion Catholics are actually fully practicing. For instance, 98% practice birth control, and many disregard the Pope as anything more than a figurehead. Very very few Catholics are the devout kind from the Medieval days. Besides, all this means is that there's 1.2 billion people still clinging to their traditional family or regional social structure that was culled together from use of the sword and stake for generations. I'm not quite sure what numbers have to do with the truth in this case. We're not talking about scholarly consensus or anything, and even in the case of scholarly consensus, numerity is not a guarantee of truth either. I'm talking about asking Him directly to show the one who is blasphemously wrong that He does not approve in a direct, physical way. Somehow.
There's another one who views things the way I do in this and many other regards, his name is Yeshu, you may have heard of him. I think his opinion is more important than 100 billion others.
If you don't think he does, perhaps we can ask him to arbitrate instead of going directly to the Father instead?