Seriously, how important is this make-believe that Star Trek stories represent some kind of "reality" and that deviations from the old versions of the show have to be accounted for within continuity?
A few years after the last Trek series was cancelled on television, Paramount and J.J. Abrams decided that the best way to revive it was to start over by recasting and recreating the original with Kirk and Spock. The writers concocted this "alternate timeline" thing.
But it's a fig leaf; that's all it ever was.
Fifty years ago, Star Trek was a particular thing produced in a particular way appropriate to that time and medium. A half century later it's a very different property. Trek's not an exception to any rule of the entertainment industry; everything has changed during that time. That's why nuTrek is different from TOS, and really no more justification or rationalization is needed than that one.
TL;DR: Remember that it's just a show; we really should relax.
A few years after the last Trek series was cancelled on television, Paramount and J.J. Abrams decided that the best way to revive it was to start over by recasting and recreating the original with Kirk and Spock. The writers concocted this "alternate timeline" thing.
But it's a fig leaf; that's all it ever was.
Fifty years ago, Star Trek was a particular thing produced in a particular way appropriate to that time and medium. A half century later it's a very different property. Trek's not an exception to any rule of the entertainment industry; everything has changed during that time. That's why nuTrek is different from TOS, and really no more justification or rationalization is needed than that one.
TL;DR: Remember that it's just a show; we really should relax.