B-1B crash result of pilot error and 'culture of noncompliance'

From TFA (?!):

"The investigation linked one crewmember’s ejection injuries to his weight, which was nearly 260 pounds, over the ejection seat’s 245-lbs weight limit for safe use, the report said. The report found that the same crewmember had been at or near that weight at several medical checks and once was allowed to continue flying with a “self-reported” weight of 245."

"In various interviews with members of the squadron, the investigation uncovered airmen’s lack of understanding and application of cold weather altitude corrections, landing restrictions and current weather sensing capabilities on the airfield."

"The aircraft caught fire and was ruled a total loss of $456,248,485."

Prima facie, there's a huge shortage of leadership underlying the accident, both at the "IC" (senior pilot) level and at the "middle management" level.

Which of the two possible causes do you think applies here?

1. Funnel intake: The US Air Force simply does have enough capable people coming into the system to make it to the relevant levels.

2. Lack of survival: relevant people come in, but leave the system before they can make impact.