I was only being facetious in making up my reason for the difference in ages. I mean, if one wants one, any reason works, really. It's sci-fi.
Not only that, it's Star Trek.
Back in the 1970s and 1980s, Star Trek fans got very creative in rationalizing the potential issues with TOS continuity as presented on screen to make it fit their ideas of canon. Some fans today are a lot less creative and a lot more strict when it comes to relating AbramsTrek to the TOS universe.