Recently I encountered quite a few insisting that punctuality was a non-negotiable tell-tale of reliability and courtesy. They even insist that being on time is already late, and refuse to work with those a few minutes after a designated time, notwithstanding any reasons for delays.
Since so many of them can be early always, they have zero tolerance for the rest of the world, so everyone must fall in line. I find such people narrow minded, rigid, and tyrannical, even when they form an industrial standard of their own.
I would rather not work at such precision timing, since the more enlightened amongst us perceive and flown with different scales of time. Deserts bloom in hours, insects live for weeks, the Earth changes across millennia.
I would rather take the needed time to work as long, or as short with diverse peoples. This is why some Asian cultures are very flexible about points in time, and other western cultures are so bigoted.
With such impatient people, I would rather work ahead of time with them, or not interact with them when even slightly late, especially when they are the ones who cannot make it on time.