It's as if some people have simply never encountered surprises in life or have never read literature or even watched a good movie.
How often does it happen, even in mundane every day situations where: you think you've got everything worked out. You know all the details. You've thought about all the scenarios and all the logical counter arguments. You've covered absolutely everything. And then the event comes, or you meet a new person with a different perspective, or you find that you were wrong about some detail - and it changes everything. And it changes everything in a way that you simply couldn't even have imagined prior to the event, encounter, or new detail. Does that never happen? If it can happen in everyday life, if it's the basis for all good stories, then is it inconceivable that it could also happen in relation important to questions such as: is there a God and why is there suffering?
If we are going to imagine a scenario as awesome as an encounter with the almighty, it seems intelectually impoverished in the extreme, not even to leave open the possibility of a surprising outcome. To insist that we are going to be in a position to lecture God about how he got it wrong and that he will have nothing worthwhile to say in response. It tells us nothing about the ultimate questions themselves, about which atheists are in no better position to offer definitive answers than anyone else, and tells us everything about the closed mind of the person making the assertion.