I can't help but notice that you did not address how that offer is an expression of Love toward the reprobate. If the offer is illusory, if the recipient of the offer cannot accept it and the offeror knows that when the offer is made, then the offer is illusory. If the offer is illusory, then the expression of love that the offer represents is also illusory.
MacArthur wants it both ways. He wants to pretend that God loves the reprobate and expresses that love by offering him salvation, while at the same time he knows that God never intended that the person hear the offer and made the offer in such a way that the person could not hear it.
That's because it wasn't my intent to address that. It was my intent to see if you could really make the conclusion that Person B's ability has anything to do with the sincerity of the offer made by Person A.
I'm not decided yet in my own mind whether the Gospel offer is one of love to the Reprobate, meaning one who God knows (why He knows is a different discussion) will never accept the Gospel, or if it's an act of judgment.