I think one of the reasons I liked Rogue One was that it's "win condition" wasn't "every one lived happily ever after". although I will say, if you have enough time to find a beach and make out, you probably have enough tome to find a shuttle, or something.
(the other reason I liked Rogue One was Alan Tudyk as K2-S0)(okay, actually, that's why I loved Rogue One. Sue me.)
Most people prefer their stories generally ending on a positive note, and then once in a while go for a darker one, if they're in the mood for it. And yes sometimes we need one of these.
But every movie being a heroic sacrifice or a downer ending, even if they're good, would be depressing. And then it would start losing power quick, too.
Sort of is tho. It might give you the false impression that the good guy wins in reality too, which couldnt be any further from the truth. It also teaches kids that there is a greater power that will eventually save them, which again is not going to happen in reality most of the time.
Dont know that so idk...
But yes, i think showing what its like to lose is important. It gives people all the more motivation to fight back if they are ever met with a choice in life.
I was thinking of stories/movies with "bad" endings and 1984 is a pretty obvious one that had a horrible ending but a massive cultural impact probably in part due to shock of the ending being so depressing.