An individual's scheme would never match up to the heavens' schemes. A scheme's success or failure depended more upon the heavens than the individual. Such cliché phrases had likely been said countless times already. But, in most typical stories, those who said death flag sentences would always die quickly.
No matter how wondrous the plan or scheme was, it would be quite easy for everything to fail for one simple reason: bad luck. For instance, if you met with a youth who just left his village… What, you're saying that an inexperienced youth who left his village for the first time wouldn't be scary at all? Ha, just watch the gears of fate turn. Perhaps that youth who had just worked as a tavern server recently would soon become the next main character of a legend.