It's a fair point, TBH.
Everyone's so annoyed about the last ten minutes being fixed, but ignores the fact that large parts of the story are dramatically affected by the choices you make. And why the hell would the fate of the galaxy depend on whether you punched a reporter in the face or not anyway?
Because the ending literally makes everything explode. Not even kidding, the Mass Relays explode like Supernovas, consuming everything.
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Twostuck, Homestuck RPG: http://www.gamefaqs.com/boards/8-gamefaqs-contests/62168402