Added 3 minutes later
In the phrase "a clash in the second week in the center and nowhere to go," the key is not "a clash in the second week in the center," but "nowhere to go."
Diamond, for example, is a very confrontational map, but in case of an unsuccessful clash, there is often "somewhere to go."
Diamond rarely ends later than the 2nd week. And on the 8th week, you can move to a side treasure or to the computers, so what you're saying – rare defeats – is not entirely accurate.