Boarding and blockade actions require you to be actually aware of the presence of other ships
With the Fitzgerald there were some bizarre direction changes just prior to collision. Perhaps there was some miscalculation during ‘the chase’. I have no idea if this is true. Just a layman’s speculation on my part. But the fact that both collisions occurred in a ‘hot spot’ of the world makes me wonder if both collisions were specifically related to the circumstances of their mission, which would make it likely that not all of the facts are going to be shared with the general public.