Because Liam Neeson was a scary dude in that movie. Same reasons people aren't afraid of fires but are terrified of candles... it's because of John Wick.
Have you actually been stabbed? No? If yes, then you should know the fear is not when stabbed, it is after when you found out the blade's rusty and covered in feces.
Same reasons people aren't afraid of fires but are terrified of candles... it's because of John Wick.