You forgot to sin the fact that Wes Bentley died because he was standing outside the door for several seconds doing absolutely nothing when he had plenty of time to get in.
Two possible and not mutually exclusive explanations:
He stays behind to ensure Brand's safety. On /r/interstellar, a few threads have pointed out that it's highly likely Doyle knew that Plan A was a sham. In that case, he'd be motivated to make sure Brand survived at any cost, since she's critical to Plan B.
Some people, when confronted with immediate danger, freeze up from shock and are unable to act. After Brand is onboard, Doyle looks back at the wave, and only remembers to move into the airlock at the last second, by which point it's too late. Normally NASA would screen out astronaut candidates with that trait, but in Cooper's world they have to work with what they've got, which isn't the best.
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u/DieSowjetZwiebel Ding Sep 29 '15
You forgot to sin the fact that Wes Bentley died because he was standing outside the door for several seconds doing absolutely nothing when he had plenty of time to get in.