The idea that the holodeck footage of TATV is somehow falsified for whatever reason makes no sense.. The only aspect of it that is not going to be historical, is where Riker takes the place of the chef - the rest is mentioned as historically accurate..
One might consider that "historical" entertainment today specifically strives not to be particularly accurate - it's just the mood that counts, and even that is generally altered to better fit the tastes of the contemporary consumer. "Historic holoprogram" is what Riker calls his simulation. Might be "footage" as you say, might instead be something "inspired by true events", as the popular catchphrase today goes.
(Grammatically, wouldn't "historic holoprogram" actually mean a holoprogram that in itself made history? That is, a great movie? That'd make it about as realistic as
Titanic at most.)
Otherwise, what benefit would it offer Riker in the Pegasus conundrum
Well, that remains a mystery no matter what. Supposedly, Deanna Troi knew, and supposedly, it worked the way she intended. Better that Riker himself have no real idea, I guess.
Isn't it already established that no one involved with creating the Kelvin debacle had no prior interest in Star Trek - as in deep knowledge of the canon, storylines, etc?
That's generally true of all Star Trek, and typically for the better...
The Borg do not technically encounter Earth till Q introduces them...
...Yet VOY pretty much establishes that the Borg are everywhere anyway, and always have been. They're the Bigfoot of the galaxy, ancient and shy until they come out and eat you. Basically everybody will have an opportunity to study Borg technology up close, then, often from the inside. Few manage to benefit from it, though!
They still need to develop the ST universe... The Moon colonies, enormous space infrastructure that should be in orbit of earth - ETC..
The thing is, Trek can also be different if it wants to. There's no "need" to have realistic and cool-looking technologies like cargo shuttles or beanstalk elevators because Trek has opted to have transporters instead. There's no "need" for domed colonies on Mars, because Trek has warp drive that makes it possible to do the more attractive thing and build little log cabins on Earthlike planets hundreds of lightyears away. There's very little "should" in Trek, because by the mid-21st century, Trek mankind already has access to truly magical technologies that transcend all our expectations, and can, say, reenact the 1960s in spaaaaaace! if it really wants to. And apparently it does!
I find it a little odd that the Romulans are all but obliterated in Prime, and Vulcans in Kelvin... These people don't like pointy ears much do they?
Good, er, point. Perhaps that's what happens to insanely warlike species eventually anyway?
Timo Saloniemi