Because its exact source line is shared mostly as a standalone clip, the sound circulates online less as a quote and more as a generic alarm for when things go wrong. Editors lift it from soundboards into short videos, streams and meme edits, where the word guardian gives it a fantasy and anime flavour even out of context. Its short length makes it easy to loop or layer over a frozen frame, and that reusable warning tone is why it keeps appearing in reaction edits.