I'm not sure about that. I agree that the world might be better, but I'm not sure they could just disable them. The next smaller competitor who won't will have more user engagement and grow. If something is a very effective advantage, I believe you can only remove it by coordinated action and enforce it on a global scale.
Modern weapons are terribly efficient at killing people. But if you're the only country that's removing them from your arsenal, you depend on the mercy of your neighbors.