You misread my post as me thinking EW and WW3 are the same, I always knew they were different. However, my point stands that Rios should have been thinking a lot about WW3 in regard to Teresa and Ricardo, and it's never mentioned.The Eugenics Wars seems to have happened in this world but it wasn't World War 3. Which happens in the future of this timeline. Khan was created in 1996 according to those files.
To be fair, if Khan ruled over India for a time period, that's not that far from a 3rd of the world's population.
And Rios apparently serves as a medic for WW3 given what we hear.
As for Rios/Stargazer, I didn't want him as a captain of a Federation ship. I wanted him as a tramp freighter captain.