This really isn't about realism, though, is it? It's about good storytelling. If we encountered a different Turk every time we had to fight them, they'd be of no interest to us at all. Each one would just be generic enemy, no more interesting than a sahagin.
Why keep the BC Turks around then, if they're never gonna show up to fight or be beaten?
And I
highly disagree about them being enemies no more interesting than a Sahagin. The Turks were some of the most amusing and interesting main story boss fights of FFVII because of their personalities, dialogue and boss battles. They all had unique attacks and rare gear to steal from them as well. And that was just Reno, Rude and Elena.
The Before Crisis Turks each have unique weapons and fighting styles that'd make them one-of-a-kind opponents. Not only that, but some wield weapons similar to the FFVII characters. That could easily open up unique battles with them and loot to obtain. They're the furthest thing from boring. Being able to win Cissnei's shuriken for Yuffie or the male Turk's katana for Cloud would be extremely appealing as trophies. They could easily function as a team of opponents ala Organization XIII, with unique personalities, quirks and strategies to take down. Quantity would not be a problem.
The story focuses on a few so that we have a chance to get to know them as persons. Each encounter builds our knowledge of them. I really don't find it much of a suspension of disbelief to assume the others are just somewhere off camera, and that's why I said I didn't think BC needed to dream up some cockamamie reason why they're not in the OG. It seems like you do have trouble suspending your disbelief. You have to see them or they don't exist. I guess Hojo only has, what, four other employees in his science department, too.
Actually Hojo has 8.
And it's not about being unable to believe what's not seen, it's about it not making sense. Throughout all of FFVII you speak to Shinra employees and even soldiers not on assignment to kill you. All those NPCs talk about how Shinra is in chaos and all resources are on high alert looking for Sephiroth or on the hunt for Cloud and his gang. When you're in Junon, the Shinra military is on high alert on the lookout for Sephiroth and Cloud. Nothing in the game ever points to Shinra having to divert focus away from the immediate plot of the game except in Wutai when the Turks take a day off.
Sephiroth and AVALANCHE are literally the two biggest threats to all of Shinra. Sephiroth murders countless Shinra soldiers wherever he goes and Cloud destroys countless Shinra machines while thwarting their plans to reach Sephiroth. And when Sephiroth
invokes Meteor, Shinra is 100% focused on stopping it.
If other Turks were to be on duty, it would make zero sense to have them waste time not addressing the most pressing mission
in the world, and it'd frankly be poor game design and storytelling to
not utilize such unique characters as bosses, either mandatory or optional.
It's the same reasoning the International edition of FFVII added
more Weapons as enemies. Not being able to confront such unique and interesting creatures would simply be wasted potential.
If their orders truly were to stop Cloud "every step of the way" then they really are incredibly bad at following orders. They didn't even try to fight Avalanche in the Mythril Mines.
They don't fight in the Mythril Mines because they're a man short. Reno's nursing his injuries. Elena is a rookie. And Rude isn't gonna try and tango with a 3 man group that includes an alleged EX-SOLDIER 1st class [strike]and his number one crush he can't bring himself to fight[/strike]. And Tseng doesn't fight.
That's not a fight worth engaging in, besides they were following the lead on Sephiroth.
But I suspect Elena isn't in the loop when it comes to company policy regarding Avalanche. In any case, once they got Hojo back, I'm pretty sure Shinra's objectives changed.
Tseng literally tells her to not spill their orders when she says they were ordered to stop Cloud by any means necessary. Tseng chiding her for leaking confirms she was right.