If early humans, post-flood, were naturally larger and stronger, then it helps reconcile the megalithic builders uncanny ability to build amazing multi-ton block structures because it was easier for them as it is today.
Even with modern machinery it is difficult to quarry, transport and position 20,50,100 ton stones.
It would also help us to understand why giants were assigned, in their respective legends, as the builders of early megalithic sites like Cusco Peru, Baalbek Labonon and Stonehenge.