I mean, it's probably more related to theme. Since we also know from the trailer that rebellions are built on hope (all I hear there is 'rebellion is the story gist for hope'), then what he's really saying is 'Save hope. It leads to dreams!'
It reminds me of the 'Save the cheerleader, save the world' line from Heroes, which I never watched. But my understanding is that version of the line probably does work better as a "solve the MC problem, solve the OS problem" type of declaration.