Well, okay, let me tailor that a bit better. Accuracy should not be sacrificed for "efficiency".
I don't mean that we shouldn't use fewer nodes when mapping a given road or landmark or whatever, as long as it's accurate. But the decision whether to map at the fence line or the building edge shouldn't be decided based on the number of nodes. We should do whatever looks better and works better and makes more sense. We should still use only as many nodes as necessary to follow whichever line is best.