Lapis Exilis, Kirk did save the planet; no one has ever done that. There is no comparison in our experience -- and no examples that suffice.
Captain Pike makes it clear he thinks some leadership abilities are inherited. The entire excellent opening Kelvin scene is this theme and for this reason. Kirk's aptitude is "off the charts."
Exactly - poor writing. We are told in one of several rather clumsy exposition scenes that Kirk is a "genius repeat offender" - but we see no evidence of his genius - though we do get good evidence of the repeat offender, rebel-without-a-clue side of his character, making his cocky "I'll do it in three" and the Three Years Later card feel unsatisfactory. Show, don't tell - first rule of good writing. The audience is given absolutely no evidence that Kirk could do it in three years other than the script beating us over the head with a hammer - he's brilliant! He's cocky! See - watch him beat the Kobayashi Maru. We're not going to show you him actually doing the work to reprogram the simulation, but since we've told you (and told you, and told you) that he's a genius, surely that'll work dramtically.
But it doesn't.
As for Kirk saving the planet - wasn't it Spock who hijacks the timeship, destroys the drill and rams the Narada while Kirk is rescuing Pike? Seems Spock saved the planet, not Kirk.
Kirk inspired loyalty from Captain Pike on this basis -- and from what Pike saw in the academy and from his actions until the point where he made Jim first officer. Later on Kirk rescued Pike from the bowels of Nero's ship.
Again, poor writing - without the audience ever being shown a single brilliant thing Kirk ever did, suddenly Pike is making him acting first officer, when he was aboard ship against orders, grounded for academic suspension. This made zero sense dramatically and was one of a series of steps where the plot has characters do silly things to contrive Kirk's supposed rise to leadership.
I'll give you that he saves Pike.
Bones realizes in the academy that Kirk's assignment is worth getting in trouble for.
But why? Because they're pals? McCoy doesn't even get a line to tell us why he thinks it's worth getting Kirk on board other than trying to take away Kirk's hurt puppy dog look.
Kirk gets Sulu's loyalty when he dives off the drill platform and risks his own life to save Sulu's.
This and Pike's rescue are about the only things Kirk does in the entire movie that qualify as heroic - and both have the reckless "look before you leap" quality that Kirk is endowed with by Pike's speech at the beginning. Which was my point that Kirk undergoes zero character growth during the film.
Kirk then saves Scotty's life through quick thinking and action in hydraulics engineering.
You're going to present the 'pointless peril in the engine room' bit as a serious character moment?
On Nero's ship, Kirk covered Spock while Spock was engaged probing the Romulan's mind. By the time the two of them boarded the Jellyfish, Spock clearly trusted Kirk and was calling him, "Jim."
You're proving my point again and again.
Look, if it worked for you - more power to you. But this is exactly what I'm talking about. You go on a mission with
anybody, they should give you cover fire. It's hardly the basis for a lifelong friendship. But it's treated as if it is - which is why the movie is poorly written. Unjustified emotional beats that fall flat because Kirk's character is almost entirely undeveloped.
None of the characters showed anything but respect to Kirk after Spock returned to the bridge to offer to go to Nero's ship. And at the commendation and promotion ceremony, the hall was packed to the rafters. Saving the planet apparently counts for something there.
Unfortunately it was Kirk being honored with a promotion when it was Spock who saved the planet, so apparently saving the planet doesn't count for something there. Being brash, breaking the rules, and having the luck to land right where Spock Prime conveniently is also stranded after getting your ass thrown off the ship for insubordination - these things are worthy of the captaincy of the flagship according to this story.