I took my babies swimming so that they didn't grow up afraid of the water and would be able to swim easily
By the age of four both of mine could swim in any event. I had them taught because I was afraid of them drowning
Actually I think I read some scarey statistics that suggested that drowning in childhood in the US was mainly the u-5 population
I suspect there are more home swimming pools in the US so the statistics might be distorted.
I personally think that not teaching children to swim is barking but that might well be just my own paranoia ...