I didn't come up with the post so I couldn't explain the logic...but it's not the same timeline is it? It's an entirely different reality.
It could well be. The Abramsverse could be more than just a different timeline, it may be a different *universe* as well. It would explain why the change in history did not wipe out the prime timeline, and also why the Kelvin
looks so much more advanced than anything in TOS.