Bent Spear = Oops ... that is going to be hard to explain. (Minor damage but weapon integrity not compromised.)
And for the difference between re-assiging officers and court-martialling the enlisted ... simple: the enlisted people who failed to do the exact job, follow a "reader-worker" check list - they get court-martialed for failure to follow procedures. The officers get re-assigned (and it is "career-ending" - not likely to promote) - because the officers are responsible for establishing the "command environment" that ensures procedural compliance, double-checking to prevent mistakes, etc. When mistakes happen, usually there can be found a series of minor mistakes that weren't corrected .. leading to the career ending mistakes.
Mike