Getting your kid to learn swimming at early stage will enable them to be confidence in water and train up their muscle flexibility from head to toe. Beside that, swimming help build their core muscle especially the back bone (Prevent slip disc), leg and arm. Ever wonder why adult with back problem are asked by their doctor to do swimming? The reason is simple....strengthening the back bone muscle to support the spine.
Being able to swim at early stage is advantagous and it leave most parent a peace of their mind regard water safety. The kid will have no problem swimming to shore to save their own life. So in a way, you are giving him or her a chance to gain this important knowledge which is a useful skill for them to remember not for a while but thru their life time. Your kid will be grateful to you...ya.
The saying.. one skill learned.. one life saved. So think about it.