Unobotainium was basically space oil. It's a lifestyle enhancer.
I don't remember what they were saying about the Dominion in the movie, I haven't seen it since it first came out and I didn't catch DS9 until it aired on Spike. But 'It helps the war effort' is something you can say no matter what when there's a war on, and mild technical advancements fall under that umbrella. And they only through the war reference in for continuity sake with the ongoing series, in the episode they mostly talked about the awesomeness of Geordi getting his eyes back.
And Up The Long Ladder was a terrible episode and the solution a necessity for survival which they talked them into, they did not coerce them into it. Protecting a smaller power from a coercive larger power is a common theme in Star Trek. Star Trek characters would always risk their survival to avoid behaving like a dictator, Insurrection is just an extension of that. It's the same with Stargate, where they had several episodes where stealing technology to help the war effort is bad.