It was not Optimus' place to decide whether or not this was the right place to discuss their war, as far as the old mech was concerned. Optimus didn't fight it alone. Optimus didn't suffer it alone.

And if they could show the people from other worlds the consequences of such a conflict and how meaningless it all was in the end...

"I'm hardly in a position to strong-arm you into answering much of anything, even if I was interested in doing so." Aftermath inclines his helm back, peering quietly at the Prime. "This is only a request. The questions I will ask you will not be pleasant but answering them at all is your decision alone."