Why Doesn't God Grant Private Revelations to Convince Atheists?

In a rebuttal to the up-and-coming Catholic debater Trent Horn, atheist Raphael Lataster comments that he would be quite happy to believe in God and obey him, if only God would personally convince him of his existence. And, since God is all knowing, all powerful, and all good, he has the knowledge of what sort of private revelation would convince Mr. Lataster, and the ability and incentive to so reveal himself. 

This is not a new argument. Richard Carrier also likes to say this in his debates, though Carrier goes one further and asserts that God really ought to reveal himself since Carrier's intelligence would be an asset to God's project. Indeed, in demeanor and attitude Lataster is a younger, Australian version of Carrier: each approaches the subject matter in a rapid-fire run-and-gun style, while sneering in a smarter-than-thou fashion at his (in his view) predictably dim interlocutor, casually dismissing entire arguments with comments like "you didn't provide the Bayesian probability analysis, and I'm not convinced by your deductive case, so you really have to start over."

Given their similarly arrogant demeanor, it is no wonder that they both employ the "God hasn't convinced me, so he doesn't exist" argument. They thereby presume that God has not made sufficient effort to be convincing, or else they, with their superior intellects, would already have been convinced, and therefore demand that God make a special, private revelation just for them.

Perhaps the reason God doesn't acquiesce to such demands for personal revelation is precisely because those very demands evince an intellectual immaturity and dripping haughtiness that would only be worsened if the God who created the universe personally bowed to their whims. Perhaps God knows it is better for them to seek with a little humility after the truth. Perhaps God understands that what prevents them is not a lack of evidence or argument. Perhaps God has already given them everything they need to believe, but they are not convinced due to a flaw in their character: they are too prideful to listen.