Minor quibble: Number One talks in this Trek of a Pike who's a seasoned combat veteran and well known for it. This short takes place before the Cage. Yet the start of the Cage and Pike's talk with Boyce clearly shows a guy who's still having trouble about casualties over the recent Rigel mission. Not that I'd ever expect him to get used to it, but it didn't seem like he'd have the full breakdown he'd have if he had the record the short indicates.
She also mentioned that he so things turning into a fight as a failure on his part, losing a lot of his crew would probably make it worse.