My view on elite sports requiring dedicated training from a young age? For every pogi/phelps/nadal superstar there are 99 other kids who dreamed of the same but spent their childhood drilled at practice putting in the same hours and never got there. Is it worth the 1% chance of professional success over the 99% chance of doing a sport so much that you don't enjoy it? ** Not in my books, I'd rather take the odds of picking something up later and then working on it.
Competitive swimming(IMHO) is a dumb sport, it really is if you think about it. You dedicate a massive amount of your youth to building up to maybe just having a shot at the only thing that counts (olympics). Squad swimming kids are at the pool early 3 mornings a week from a young age. forget 10 000 hours, for swimming you need 30 000. It's a recipe for burnout and no way to grow up even if you do get there - the best possible outcome is you get really good is a kickass college degree(that you hardly studied at because your eyes were so burnt from all the chlorine). Simple answer. reduce the amount of olympic medals for swimming, it's really not such a big sport in the scheme of things but is only held up because it is big at the olympics.
Moving on we now have the chinese sporting model, which is version 2.0 of the cold war academy. They throw money,coaches etc at promising kids in olympic medal sports. eg. Does china have a canoeing scene? no, not even a club or a race but they now have olympic medals in it because they have sent a battery of kids through a boarding school for 15 years doing it for the state.
another example Lily from china who won olympic sailing gold. her parents saw her 2 weeks a year from the age of 8 and had never seen her actually sailing. Actually a sad story, she doesn;t sail anymore is much happier being a broadcaster/commentator
https://edition.cnn.com/2015/08/04/sport/xu-lijia-china-sailing-olympics/
Instead I like the Norwegian model, let the kids play, if they show promise then work on it much later
https://www.aspeninstitute.org/blog-posts/how-norway-won-all-that-olympic-gold-again/
edit: added this from another link,
https://www.theglobeandmail.com/sports/olympics/article-norways-radically-different-approach-to-sports-helped-it-climb-to-the/
** figures generalised obviously much closer to 0.000001% and 99.9999999%