Yes, instead of seeing time as a point, there is a culture of seeing it as a range. The range is derived from context (how pissed people will be if you are late

Yes, instead of seeing time as a point, there is a culture of seeing it as a range. The range is derived from context (how pissed people will be if you are late/how informal is the event). The range might even be different for different people according to their roles. This gives you a buffer to handle many unexpected things. It also allows you to disassociate urgent from important. There are plenty of important things that get done at the expense of arriving late. True, sometimes you have to wait for other people to arrive, but that is expected, so you can arrange your day around it. And when the time comes you know it is okay for them to wait you. It is efficient once you get the hang of it. It is even more efficient now that smartphones are ubiquitous, you can coordinate the range in real time!