Helping young adults or teens find the right mix that works for them can be tricky. Many Teens are not getting as much rest/sleep as they should.
http://www.nationwidechildrens.org/sleep-in-adolescents
"Adolescents are notorious for not
getting enough sleep. The average amount of
sleep that
teenagers get is between 7 and 7 ¼ hours. However, they need between 9 and 9 ½ hours (studies show that most
teenagers need exactly 9 ¼ hours of
sleep)."
That aside the amount of "screen" time they have with electronic devices is another concern.
There is a lot more beyond sports and academics work: social, Civic, and jobs for adolescents. How can they do all things at the "highest" level, or course they can't. How many of those or even beyond one of those can they devote the attention and dedication required to reach those levels?
Let's say top is 10-15% (gold), 1% (Platinum), .5% (Plutonium), .1% (Diamond).
There might be some who think their kid is a diamond soccer player and Gold level academically but beyond that I doubt they other areas are in top range, you can't be all things to all people, choices and prioritization are the only way.
Being well rounded is a problem we have W/ some adolescents nowadays, they are too narrowly focused on the small picture and tend to forget the Bigger ones. I'm fine with a silver level sports player who is also at that level with everything else rather than a diamond player who is basically dirt in some of other things that are important but everybody is different so they have to find there own ways.
My kids have/had a lot of friends with tiger type mom's with very stressful parent relationships. They are well meaning no doubt, but giving kid's freedom to go there own way, make there choices, learn from their own mistakes is something they will thank you for later.