Okay, I think this is the crux of the argument. For me, time spent waiting after an agreed upon time feels much worse than time waiting before. Morally, time waiting after represents Someone Breaking a Promise in a way time waiting before does not (absent a meta agreement about what “on time” means, which it sounds like you have). Practically, time when I know when I’ll be interrupted is much more valuable than time when I could be interrupted at any moment, and people tend to get angry if you keep them waiting after the appointed time, even if they were late. I can’t start something new if I might be interrupted at any moment and I can’t pick something that will fit in the time slot because I don’t know when I’ll be interrupted, so the time is just *lost*.
Okay, I think this is the crux of the argument. For me, time spent waiting after an agreed upon time feels much worse than time waiting before. Morally, time waiting after represents Someone Breaking a Promise in a way time waiting before does not (absent a meta agreement about what “on time” means, which it sounds like you have). Practically, time when I know when I’ll be interrupted is much more valuable than time when I could be interrupted at any moment, and people tend to get angry if you keep them waiting after the appointed time, even if they were late. I can’t start something new if I might be interrupted at any moment and I can’t pick something that will fit in the time slot because I don’t know when I’ll be interrupted, so the time is just *lost*.