There are thousands of uploads of babies and toddlers swimming, children can swim from an early age, if they start correctly.
You can never be a strong enough swimmer, at some point you will be put to the test, it is worth having done as much as possible to increase your chances.
Judging by the amount of people and especially children we pull out each year, most people don't take it seriously enough.
Most people who complain that swimming lessons don't work, only do the lessons,
If you had a music lesson once a week, and failed to do any practice, you wouldn't get very good at playing the instrument very quickly, same with any discipline, you have to practice, get those children in water as often as possible.
We came out of the sea, hung about for a bit, then went back in, when we remerged we lived on the coast line, mainly living on shellfish, which is why our hands and feet go wrinkly when we are in water for a while, clever development for creating a good grip, we are designed for water, we live on a planet that is mainly water.
It is a very bad idea not to learn to swim as quickly as possible, and very stupid to not get accomplished at swimming as fast as possible.