I am one of those obsessively on time people.
It comes in no small part from having spent ten years as an airline ticket agent at DCA. Trust me, airlines care a great deal that flights are on time. If a flight was late, every single minute of the delay had to be attributed to some employee or group of employees. Two minutes to ground handlers (meaning they were slow at opening the cargo doors), three minutes to unloading (five minutes was the allowed time, this took longer), then it loads and the doors close on time. Alas, there's a delay, so five minutes delay now gets blamed on Air Traffic Controls. During the flight, those minutes are made up, but now there's a delay approaching the airport. Six minutes blamed on air traffic control.
I think you get the idea. Being on time is wonderful, fabulous, and everyone should always be on time everywhere. Really, they should. And keep this in mind the next time your flight or bus trip or trip somewhere is delayed.