That's a fallacy, similar to claiming driving in a car is safer than flying in a plane because you're more likely to survive a car crash than a plane crash.
It seems you're attempting to suggest that local sports are less harmless than the Olympics, by somehow equating the latter to an increased risk of apocalyptic nuclear war?
Please provide evidence if you're going to make such an outlandish claim. One could just as easily claim (similarly without evidence) that the Olympics actually reduces the tension between nations and reduces the risk of apocalyptic tail events compared to local sports which provide no such relief of international tensions.