"KYS" vs "kill yourself"

Riot,

You claim to not take context into the situation, then how does your system differentiate between these two lines? Allegedly, one results in an immediate ban. Fair enough. "KYS" is likely used in toxic situations. However, players that type it out, "kill yourself," are allowed to continue playing, even if they are using it in the toxic context. Now, you'll likely go into some defense about how "kill yourself" can be used to tell a player (champion) to suicide instead of dying to the enemy team, but both "kys" and "kill yourself" can be equally toxic. I had a player tell me to "kill yourself" in the game, and I reported. Several games later, still playing. I'm curious to see how you attempt to defend this.