Point in case: in 2019 I had to make the decision of whether to relocate to the US or stay in the UK. My wife had just gotten a job after a long unemployment period. We ran all kind of alternative scenarios and "simulations" in our mind, calculating the pros, cons, and probabilities of each outcome. We finally decided to stay in the UK one year longer, in order to give her some working experience and confindence.
Then in 2020 we got Covid and all of my plans ended in the gutter.
All of this advice is great, so long as you accept that you are only slightly reducing the chaos and randomness of real life.