1
Humans trust repetition and physical presence far more than competence or charm — the mail carrier becomes trustworthy not because he is exceptional but because he is consistent, which is its own form of danger to anyone selling you the idea that you need to be remarkable.
2
William Fichtner's Wayne in Lucky keeps danger at a distance by becoming reliable in a way that makes people lower their guard around him — the mechanism works the same way whether you're delivering mail or manipulating your environment, and the people who understand this aren't writing productivity blogs.
3
The world is increasingly built for people who can afford to vanish (remote work, digital services, algorithmic matching) and increasingly hostile to people whose value depends on being physically and repeatedly present, which means the mail carrier's form of power is becoming rarer and therefore more valuable to anyone who still practices it.