The attitude of "leaves the room in the middle, before the business is finished" may certainly be a problem. Being a Spaniard, I see the inherent value in Figure 4.5 "Spanish schedules: In theory, in reality". A day schedule would be seen as poor and aseptic without the "meets in bar" at the end. For us, those differences between what's scheduled and the actual sequence of events is where life happens. It's no wonder that the novel "Momo"'s setting was placed in Italy. [1]
Also, in the multi-active culture, the other person shouldn't be there waiting, idle, twiddling their thumbs; they're surely have plenty of other things that can take care of in the meantime. (In the modern world they could be conducting other businesses by phone or with their laptops, but those are still Western-thinking tools; other options could be to socialize with the people at the building, reading a book or merely enjoying the scenery or getting lost in their thoughts. When was the last time you planned for that?)
[1] https://en.wikipedia.org/wiki/Momo_%28novel%29
edit: grammar