Scrooge McDuck
Member
If people think it feels extraneous/gratuitous, then certainly it becomes an argument. Like having Benedict Cabbagepatch be Khan in that Star Trek movie just because everyone recognises the Khan scream.
Then I disagree about the "just because" part. The Vader-Leia scene is there to drive home the point that their sacrifices aren't for naught, for it directly kickstarted a chain of events told through a whole trilogy that ends with the Empire's fall.