That is a great point .. but doesn't it mean a pre existing knowledge of future .. means you already have complete data about Usain Bolt and you can fully preempt the future .. may be , in case of Usain , you can but who knows he wouldn't have cramps right at the first step of race .. still it is a good probabilistic decesion .. I give you that ..

But in reality , we neither have complete knowledge of past , nor a good enough probabilistic model to predic future .. if one claims to have such a model .. it is literally called blind faith ..

That is the reason diversification is a great strategy .. because perfect knowledge doesn't exist ..

Besides - the goal is never to maximize wealth .. goal is to survive as long as possible .. because in this world - survivor always wins ! ..