Germans abhor lateness and even if they should say things like “Make no worries for yourself. We understand it iz possible, due to unforeseeable miscalculation of estimates, to sometimes late be,” they find the idea of tardiness disgustingly decadent and perverse.
This reminds me of the Netherlands. We never want to be late either and being late is really really bad. Seems we have more in common with the Germans than I thought. Better be 15 minutes early than 5 minutes late.