It is not humanly possible for a person to prepare his future exactly as he would like it to be.
No person can possibly figure out in advance all the myriad possibilities of what might happen in the future.
It is not worthwhile to give excessive thought about what will occur in the future. Who can be certain how events will turn out? What now appears as good, can be the source of misfortune.
Conversely, what you consider bad can eventually be the source of happiness. Every single person can verify the truth of this statement from daily events he is aware of.