Swimming is a great sport and exercise
I agree!  It is one of the top public recreational activities - in some countries swimming lessons are mandatory!
Have you heard of Michael Phelps?
Yes, he is amazing!  But he's retired  now I think but he's the most decorated Olympian of all time!
I did not know that. He was so great
He really was/is!  He holds 23 gold medals total!
I think that is more than many single nations
I think you may be right!  I think we were created to swim though as babies can actually hold their breath and make swimming motions within weeks of birth