It is not even about Satoshi, it is about his vision, which many people still believe in, that is not an appeal to authority. At least not for the people that truly believe in this vision independently. His arguments stand by their own merit, not his authority, do not conflate the two.
And what is Satoshis vision exactly?
I think you have severely misinterpreted what Bitcoin is.
Bitcoin isn't a religion. There is no need to refer to a "Bitcoin god" or his "vision".
You should be able to come up with your own arguments for a block size increase.
If you have to rely on some mythical figure for guidance your argument is obviously too weak.