You're still hinging everything on a presumption that a supreme being would not be interested in mortals. What do you know about the nature of a supreme being that would preclude that? Why NOT talk to the self-aware moral agents that you (hypothetically speaking) created? And why wouldn't you speak to them in a way that addresses their specific behaviors and concerns? There's even a line in the Bible that can be plausibly read as suggesting that God doesn't just deal with humans, John 10:16 "And other sheep I have, which are not of this fold: them also I must bring, and they shall hear my voice; and there shall be one fold, and one shepherd."
I don't expect to ever see a formal proof or disproof of God(s) from basic principles. But little to nothing that humans conceptualize and utilize really is. We observe things, measure them where we can, discuss our observations with others, write them down for posterity, rely on the written observations of others, etc. But suddenly, when it comes to questions of religion, observation and recording those observations is treated as worthless. If someone told me an angel visited them last night, I might be more inclined to believe they were tripping balls, but it's not a given that they were incorrect, and if 20 people ran up and told me they just saw a blind man healed by a carpenter telling him to be healed, that's harder to brush off.