Why is the entire world late? or atleast most of the United States?

So I am 31 years old...over the last 15 or so years of being responsible and having to get myself places I have rarely been late...I can count the number of times I have been late to anything on two hands, and those times were often the result of someone else being late and I had no control over the situation...I guess I don't know why so many people seem like they just CAN'T make it anywhere on time...I have 3 boys ages 7, 6, and 3 which are terrible sometimes to get ready and out the door, but I am still on time the majority of the time...why then, is it so hard for other people who have no kids and aren't married to get themselves places on time?