Yes...good point...I see. But wouldn’t you assume that these theoretical Asian boat people were skilled fishermen that could sustain themselves merely sleeping on the shore at night and cooking their fish as they then continued south in the AM?
Sure. The rate of migration was maybe a mile a year. Nothing to stop some of the kids from going ashore and looking for some of the big game, and they could spend all summer doing it and still be home before dark. :)