There's a lot of reasons why the plot fundamentally makes no sense, contradicts itself and insists on a forced narrative. But in a vision of this game where the plot isn't written in a fit of retardation, K would just be a full of shit misanthrope who is feeding you lies and likely may have been responsible for the plague to begin with. He comes across as the kind of guy that wants to ethnically cleanse the "blight" that is humanity (by making them all into sex-crazed furries). I mean the turret room dialog is telling enough about how gleefully he boasts about how he turned countless people into retarded submissive dog-men during the riots. And in a superior vision of this game, you should be able to kill him even if it means dying in the process. He deserves it. But the creator is on his side so he's going to be a gary stu somehow.