Barton and Hanretty will mention withdrawals on the ISU channel without citing a reason. Sometimes they fill it in later, sometimes they don't. I still haven't seen the SP's, and I may have forgotten, but I don't remember that they explained during the FS why both men withdrew.
I think the discussion of what it's like to think that, even though you're planning to put your best out there, a week ago you thought that you were fighting for fourth or fifth to make the National Team, and suddenly you're in a position to be on the podium would have been an interesting discussion. Or, if that doesn't apply, that the entire Fall you were expected to medal, and there was a different kind of pressure, or whatever their situation was. And in Moore-Towers' case, what the pressures were once she made the partner switch.
And the discussion moved on organically from something factual. In this case, by not mentioning it, it became a thing.