I'll have to disagree with your disagreement, yet agree with your agreement over the other points that we agree on.
As it is just on the one point, I'll expand slightly.
I think at the point of incident origin, bearing in mind they were (imo) returning to base after the task, the pre landing checks and actions were being carried out and they would be securing everything for landing. The last thing being thought of was a radio call .... and then something happened, and it happened very very fast.