Agreed ^ and a major change the reboot accomplished is changing the way T
ravel works in Star Trek.
It has rebooted the single timeline staple of Trek TT with many worlds theory which means any attempt to TT will result in the traveler switching timelines just as Nero, his crew and Spock did. Any attempt to "go back and repair" something in a travelers timeline of origin will only screw up (alter) things in a new, innocent timeline.
For the purpose of this topic we have to understand, (and accept) a fundamental change in the way "Spock" thinks after coming through the blackhole. He longer thinks of TT in the same way many fans still do; the single timeline. "Going Back and changing the past" is no longer how he understands Trek TT science. His way of thinking has been converted (rebooted) to align with Many Worlds Theory and therefore he now knows any attempt to TT will not achieve the desired goals in the timeline he now occupies. His best option, to avoid screwing with other timelines, is to make the best of his current situation.
I believe this to be one of the Paradigm Shifts they intended to achieve in Star Trek. All the above is, of course, my opinion.