The reason for targeting "Point Nemo" is that it isn't really a point. The nearest piece of land is 2688 km away. So even if the debris is spread over a 5000 km long strip (and it will be a strip), so long as the center of the debris field is near Point Nemo, nothing will hit land.

The reason for targeting "Point Nemo" is that it isn't really a point. The nearest piece of land is 2688 km away. So even if the debris is spread over a 5000 km long strip (and it will be a strip), so long as the center of the debris field is near Point Nemo, nothing of substance will hit land.