Note, too, that the young Kirk we're told of in TOS is a serious minded and determined student, a "stack of books with legs." Abrams chose to redraw that character and gave us Chris Pine's punk.
Honestly, I've always thought of that "stack of books" line as an abberation. It was a throwaway line of dialogue in an early episode that, as far I know, was never referenced again. I doubt that it was ever meant to be the definitive statement on the early James T. Kirk, or that anyone expected fans to be citing it as Holy Writ forty years later.
The truth of the matter is that we never really got an origin story for original-recipe Kirk, so there was no need to give him any sort of character arc to explain how he became
the James T. Kirk. Since we're starting at the beginning this time around, it makes sense to show us Kirk maturing slowly over time.
Also, on a practical level, movie audiences don't remember that "stack of books" line and that's certainly not how the general public perceives Kirk. Audiences expect a cocky, reckless, impulsive, womanizing Kirk so that's what you have to give them. Giving them a "stack of books" just because of a single forty-year-old line of dialogue makes no sense at all. You're just going to confuse and disappoint the audience.
It would like be making a James Bond movie in which Bond is a mild-mannered virgin attending prep school . . . .