If you want to guard yourself against the negative effects of life’s inevitable obstacles, hardships, and burnout, then make yourself more robust by intentionally exposing yourself to randomness.
The reality for so many people is that the bulk of their lives is lived in repetitive, predictable, and safe ways. Over the course of their lives, they develop the ability to function in a specific domain and under largely predictable conditions.
Although this pattern generally suffices so long as nothing changes, when an unanticipated external stimulus or event occurs that knocks them off balance in the form of illness, hardships, or obstacles – they flounder.
To increase your chances to weather life's inevitable storms and put yourself back on course when you get knocked off, enhance your robustness by exposing yourself to randomness.