He hadn't graduated. He was in his THIRD YEAR. And when you graduate, you are an ensign.
Well first, Pike says Kirk could be done with the Academy in 4 years and he says "I'll do it in 3". Then it says "3 years later". So the implication was that he graduated early.
He went from a third-year cadet (a junior, for god's sake) to CAPTAIN -- from O-zero to O6 in five minutes.
Again, he was a graduate not a cadet.
Yeah, I recognize that. But a *singular* achievement does not negate the need for training and experience.
Clearly, he didn't NEED any more training or experience. He took command of a ship that was set to not aid Earth *at all*, turned the situation around, and literally saved the planet.
Clearly, he knew what he needed to know.
Unless they explain some weird reason that Kirk is WAY older than he should be, a junior is typically 21 years old.
I'm sorry, but for all the fun this movie is, that stuff just strains my credulity to the breaking point.
Kirk is 25.
And again, Horation Nelson was a Captain at 20 and Stephen Decatur was commanding the Enterprise at 19 and was a full Captain by 25.
Your definition of "strains credulity" flies right in the face of naval military history.
The military structure of the 20th century, where promotion is based on tenure as much as anything, is certainly not the only way competent fleets have ever been organized.
In fact, history has frequently been written by extremely young, "inexperienced " men taking command of troops.
Alexander the Great had conquered the known world by the time he was 30. Talk about straining credulity! Except, you know, it actually happened.
Sorry, what Kirk does doesn't seem that far beyond things I know for a fact actually happened, so I am fine with them happening in adventure fiction where there are FTL ships, teleporters and touch telepaths.