And you come across as needlessly, nigglingly, combative because someone dared point out shortcomings of your beloved series. Oh well. I guess that’s you.You first tried to claim that the writers did the war as a result of studio pressure; I pointed out that that was false and that the writers did the war of their own volition. You then tried to claim that they did the war because of commercial pressure, with no evidence. You do come across as weirdly attached to the idea that they did the war because of some outside pressure, instead of just acknowledging they did the war because they wanted to do the war.
The writers adjusted their plans throughout the series run, as those of any show do, and, gasp, creative decisions might have been made in light of broader considerations. They might have delighted in being able to lean harder into the darker stuff and serialization than they initially thought they’d ever have been allowed to (and were only able to in part because Berman was focused on lighter episodic flagship series Voyager), but that doesn’t mean that doing WWII: In Space! was always part of the plan. The Cardassians were frequent baddies and the Dominion were being set up to be the same. Same as on any show.
The war arc seemed to be the juiciest way to push for serialization. Every series wants to be a success and every writer thinks that if they could just do whatever they wanted, the fans would love it more. So, in a landscape of declining viewership across the board, they swung for the fences.