You say, "There is not one culpable atom in the universe." This is true, but your implied conclusion, that there are no culpable persons in the universe, is false. Likewise, there may not be any agenty dust in the universe. But if your implied conclusion is that there are no agents in the universe, then your conclusion is false.

(Edit: there is another inconsistency in your way of thinking. If you assume there is no culpability in the universe because atoms are not culpable, neither is it worthwhile to save human lives, because there are no atoms in the universe that are worth bothering about.)

I'm not saying that no one's responsible for anything, and I'm not saying that there are no agents! I mean, seriously? Do you actually know people like that?

I started to write a substantive reply to this, but I've interacted with you in the past and you're one of the few people who I don't even want to give a chance to. And I'm the kind of guy who is this charitable. And I just wrote an entire article about engaging virtue ethicists instead of blowing them off, and I'm still blowing you off. Come back when you have a non-ridiculous interpretation of my arguments, or don't come back at all.