I did make the assumption that most stuff happens and most of the world revolves around daytime, which as far as I know, is very much true. Business hours, work day, most activities, most societal happenings are during that time between morning and night and in a vague sense globally shared. So naturally it makes sense to schedule the day around that and since that general rule holds true from country to country, it does make life easier to have time zones and be able to share that understanding of time of day. You are mentioning people or situations where they don't adhere to that general rule and as far as I understood it are using that as an argument to have a different system. But I'm not sure what sense it makes to change a system that works for most to a system that would benefit... not sure even who.

You correctly boiled the argument down but somehow you either disagree about how societies pretty much everywhere work or think that those exceptions you brought up are enough to change the system that works for most. And that just doesn't make very much sense, sorry to say. Maybe there's some vampire world hypothesis behind your reasoning and there's actually 4 billion people in vampire countries where it's flipped and it's the night when it's business hours, typical work hours and whatnot. In which case, I'm intrigued and definitely want to hear more. Because doing stuff during the day and sleeping during the night is sorta the norm for us non-vampire humans. We are what scientists and I call "diurnal".