I feel like you missed the point at the detriment of people taking your position seriously. Words and their definitions are very important in communication and I feel like semantics is something that is very undeserving of the flippant treatment it routinely receives.

If someone were to accuse someone else of lying, this also comes with an accusation of intent. It isn’t sufficient for someone’s statement to be false to be a lie, there also needs to be intent to deceive. Intent to deceive implies that the liar at least knows what they’re saying is untrue, and possibly implies they know what is actually true depending on the context. However, if there is no intent to deceive, it’s usually a case of that person just being mistaken. How frustrating would it be for someone to be accused of lying when they say something they believe to be true? And how seriously should they take their accusers when not only being told their view of reality is incorrect, but also being informed that their own intent is malignant when stating something they believe is true?

So, when it comes to describing something as a genocide, you’re also describing intent. If you tell people that they’re killing animals with the intent to extinct them, they’re probably not going to take you seriously. It’s probably better to have someone tell you what their intentions are rather than just assuming you can slap a piece of paper saying “this is you” on a scarecrow before drop-kicking it.