Is it really worth while to try and pinpoint a time when swimming was forgotten? My reasoning is that in a world where people are born, work and die in one pla

Is it really worth while to try and pinpoint a time when swimming was forgotten? My reasoning is that in a world where people are born, work and die in one place there is a smaller chance of them ever needing to swim. Only coastal people really need to swim and even then, as the article states, mostly if they harvest aquatic resources. So in other words. As long as global communications have been lacking humans have been living very localized lives and not had the need to swim. Why then try and pinpoint a specific time when we "forgot" to swim? Doesn't make sense to me. And yes I know strontium analysis show that humans could migrate a long way even in ancient times. But they were usually migrating over land. With the exception of small groups of humans during relatively small windows of time who aided in colonizing islands like the british isles or south east asian islands, people who weren't involved in the aquatic industries mostly moved across land. I guess the article is trying to say that humans moved away from coastlines as agriculture became more efficient. And therefore forgot how to live near the coast.