Re: Who raised James Kirk in the primary reality?
Maybe the Kirk brothers were sent down to Kansas to stay with the Kent family in Smallville.
In terms of on-screen canon, I don't think there's anything indicating Kirk's parents were in Starfleet. And the late Sam in Operation-- Annihilate! didn't appear to be in Starfleet either.
Dr. Howard, Dr. Fine, Dr. Howard: For Duty and Humanity!
--Men in Black, 1934.