Competitive Swimming isnt all about getting your kid to a good school, and it shouldn’t be. To take up any sports, one require discipline, perseverance and definitely passion. If your kid were to join competitive swimming for the sake of DSA, she will lose interest in the sport in the long run.
My daughter is a competitive swimmer, and like any other sportsman, she trains up to 14hrs a week. I would say she has not only become more discipline but also learnt to persevere and "take the pain, and continue". It is not about intensive training, but how one manages her time.
It is true that she has broad shoulders and very sporty build (not exactly muscular), but this shows that swimming is a very effective sport. It trains almost all core muscles (thighs, abdominal, back) and most importantly, it keeps one fit and agile. If one participates intensively in any sports, he/she is most likely to become a little muscular, not just in swimming.
Yes, swimming is all about the millisecond. This just shows the importance of time, and how one will strive to improve himself by that millisecond. And to improve, training is a must.
I hope this answers your queries, and will help you make the decision on whether or not competitive swimming is suitable for your kid.
Thank you