Temis the Vorta said:
I can "process" just fine, thank you.

I just rewatched
Where No Man Has Gone Before, in which the clear implication was that Kirk was Gary Mitchell's instructor at the Academy in his early 20s ("15 years eariler," do the math), meaning he had graduated around the age of 21 as per usual.
Maybe he was going missions and then returning to teach at the Academy from time to time, but he wasn't still a student. For him to have gone on to become an (unusually young) starship captain by his mid-30s implies he wasn't sitting behind a desk in his 20s.
More to the point: who the hell wants a movie about Kirk sitting behind a desk? Regardless of his age, we want him going boldly. I don't object to Kirk & Spock being around 20 (I don't see why a 20-year-old character needs to be laughable and puerile in the "Star Trek 90210" mold), but having both be around 30 seems about right to me.