Likely because it's being perceived as a third party app that was just arbitrarily installed. At least it can be presented that way, which is enough to get the story to spread.
It's honestly not that far off from the truth. Just because google uses your phone as a personal playground all the time doesn't make this instance any more or less outrageous. If this is what it takes for it to be perceived as outrageous as it is, then fine.