Heh well thank you but I can't take all the credit. It has been mentioned with similar nonchalance in GOTMs and other games of very skilled people.
Usually this tree of reasoning sprouts from "to move the settler or not." Because if you have to move before settling you lose 1 turn of research, and production. That means yours first settler comes out 1 turn slower, and you can't settle your second city until 1 turn later. And chaos theory takes over and blah blah.
But if you think about it, it's a pretty obvious concept indeed:
In the early game smaller things matter much more. A "large" force early in the game is 8 chariots, or 6 axemen and that can easily take a city and cripple or destroy an empire. Later in the game a large force is 25 trebs and 15 macemen, later in the game it's 35 tanks.
So in the time it took you to build the pyramids, or great library the hard way, you could have made a reasonable "large" force in the early game (6-10 units) which could win you a war. It is very unlikely that settling a GE and gaining 3 hammers a turn will have such an obvious impact on your game. Even though over the course of the game he will have netted you more total hammers. The majority of them will come at a time when they aren't game breaking.