I have some thoughts about Sargon, the Preservers, Organia and the galactic barrier, but that's a different conversation than the one about Spock...
One is that the Organians saw V'ger coming and triggered plans to leave this universe -a thought TNG, etc., fans ought to love if they think about the implication- the neighborhood was getting crowded w/ base-type beings, enforcing the Oganian Treaty was turning out to be annoying/distracting work, and they might could pop back into this universe to continue to run their varied projects just as easily as moving around inside it.
Some more of those further implications of the Original Earth and Progenitor hypothesis:
(For convenience, I have and will refer to ST Earth as
our Earth, even though it clearly had diverged by sometime in the 90s -Khan- at latest.) I surmise that our Earth is maybe still on the original track, dominated by Europeans and their descendants, which explains -probably- a lot of what I've observed about the pale humanoids being over-represented all over this end of the galaxy, at least. I also conclude that we're one of the experiments running -obviously- just not diverged yet - or not diverged, anyway, from the dominated-by-Whities part.
One of those Golden Age SF tropes (Race, as I'm grappling with and trying to handwave is another - Issac Asimov concluded in his autobiography that his mentor, Golden Age Giant John W. Campbell, was actually a benign unreflected racist, preferring a future full of super "Americans" in all-but-name and
Star Trek suffered from same for similar and related reasons, for all that it labored so hard and commendably on representation issues. Nets nurds do racism -and LOADS of misogyny- all over the place to this very day, frequently appearing to not know that's what they're doing.)
Starting over, that paragraph got away from me, one of those Golden Age SF tropes
Star Trek base-assumed w/o reflection is the Inevitable Shape Of Human Evolution, to wit, in 10,000 years our descendants will look like Talosians. Huge heads, mental powers, likely powerfully psychic, not formidable physically. Now, we know that is
dumb if we understand how evolution works - our descendants might be good at breathing pollution without getting sick - THAT is how evolution works; smarter space people w/ superpowers is only
one possibility that would be survival-positive.
However,
Star Trek rolled w/ the big heads and all, base assumption. And we meet the Talosians in
The Menagerie, Trelane, who appears to have mostly ascended, in
The Squire of Gothos, the gambling disembodied brains of
The Gamesters of Triskelion, Ascended Apollo of the Greek Gods in
Who Mourns for Adonais? - Later, powerful telekinetics, likely related, in
Plato's Stepchildren, Lokai and Bele, half-black/white bigots with considerable mental powers in
Let That Be Your Last Battlefield --- and, of course, the intellectually-advanced Vulcans, who, if Spock is typical, are capable touch-telepaths. -All somewhere on that 'futureman' evolutionary track.
The Preservers -I use that as a blanket term for all the post-human godlikes under discussion, past and present, whether they do any preserving or not- probably arose from a mental mutation in a specific population on the Original Earth, and when stocking the galaxy, naturally favored their own descendants and relatives for more than one reason.
See, there's no reason to assume an energy being can 'breed' more energy beings. (See also the
Voyager episode with Q -yuck- being half of the first Qs to breed.) -And no reason to assume their evolution had placed them beyond wanting to. So, it follows that they did two obvious things that have so far been stumbled over: stock the universe in convenient reach with primitive relatives who CAN breed and hold the potential to evolve on their futureman track, and build the galactic energy barrier that zapped Gary Mitchell to occasionally speed things up. It's very credible to assume that if Mitchell had survived longer, he was going to become an energy-being god, and who knows where he'd have ended up doing what after he shook off the birth pangs... Different beings thus zapped/boosted could go on to do an infinitely great range of different things, but some would probably join the similar beings, Organian and/or Metron. -But I bet it works on the humanoids stocked everywhere, not, say, Gorns or Tholians.
Now maybe they
could 'breed', but wanted to encourage some evolutionary variety on compatible tracks, as an element of their own growth and evolution - that works, too, as an explanation of what's known.
For godlikes, TNG-and-later had a grand total, off the top of my head, of Q, the old man in
The Survivor, I think it was, who reflexively wiped out an entire interstellar empire race who killed his human wife, and the hyper-intelligent people on that planet galactic coreward who manipulated Barkley. It's a breathtaking departure from actual
Star Trek in need of hard handwaving to fit, and I think I've managed that, assuming that Q and Trelane and Apollo are part of the same thing, left this universe about the time of the first movie -Apollo talked somewhat along those lines- and Q and Trelane are stunted throwbacks, to engage in such stupid antics...
And I think that finally concludes my thoughts on these lines, save mentioning that Spock must have had comic-book telepathic shields to not get zapped at the galactic barrier even before Mitchell and Dehner...