“everyone’s lives would have been better for it”
I agree with the person above this. The equivalent of what this picture says in real life is this: “World War I would have never happened if Gavrilo Princip didn’t assassinate Archduke Franz Ferdinand and his wife Sophie.”
Because no, WWI would have happened because the tension was already there and rising rapidly, it just needed a starting point. And if that hadn’t happened, something else would have.
Also I haven’t watched the show but I am currently reading A Storm of Swords.