“Whatever can go wrong, will go wrong”
Being a Stoic mean’s preparing for the worst, including visualizing it beforehand to temper it’s emotional impact. If it does not happen then what comes instead is a happy surprise.
This does not mean I am a pessimist, just a realist. I don’t think about the events I can’t control, just those where my actions have a chance of impacting the outcome (Meteors landing on the house? Not preparing. The next recession? Preparing).
In the end, I will die of something anyway along with everyone and everything else. If I spend my entire life worrying about disasters that might happen along the way I will have no time to enjoy the limited time I have. Living life is a balance between preparing for the worst and enjoying the time I have. All preparation and no enjoyment is a wasted life.