I just don't see where there's a fundamental problem with telling stories in eras of peace. Star Trek has done pretty well in that regard for close to half a century now. It's a nonsensical generalization to say that a given setting or situation for storytelling can never work.
And I have no idea where you're coming from with the GL/Power Ranger comparisons.
And I have no idea where you're coming from with the GL/Power Ranger comparisons.