I don't believe you are grasping the concept of 'alternative timeline' surely you have seen Back to the Future II?
As a fan of the Trek book series' I have accepted the alternate timelines a while ago, I was just taking into consideration that the movies defined that which was canon, and therefore, rewrote all that was Trek.
What can I say? I really miss Amanda.
Sarek missed her, too. But he did go on and marry Perrin after Amanda died. At least he did back over in the Prime Universe...
For the record, I enjoyed the JJ movies, along with TOS and the rest. As Smellmet said, for me they are all 'different flavors' of something I like.