Chances are the medical protocols have not caught to reality yet, so it would be hard to tell how thorough a routine physical would have to be to find an issue that can lead to something like this. It’s like a blood test that does not test for everything.
At one point in my career, I was knowledgeable about sudden cardiac death in athletes (it’s a thing). My angle was, “what testing can/should be done to identify potential sudden death in young athletes?” - and the answer then, as now, is “nothing”.
In the 1970s, when I was still doing that stuff, the most common thing a relative of a sudden cardiac death victim would say was, “But he just had a checkup!”
Lots of athletes who die suddenly have hypertrophic cardiomyopathy and abnormal EKGs, but most athletes with those things don’t die.