Life is about choices. Everybody has the same number of hours and minutes in every day, week, month. How we all choose to spend that time is where there’s a lot of options.
Should you choose an extracurricular activity just because you think it’ll help you get into college? No. That’s a good way to be miserable.
Should you do an extracurricular activity that you enjoy? Yes.
If that extracurricular ends up helping you out in the college app process, that’s icing on the cake.
Take whatever the particular children’s extracurricular activity is and out of any pack of parents, you can probably find at least one semi-crazy parent who’s super mega pushy and is convinced that THIS will be the thing to catapult their kid into Dream College.
I think the general advice of “don’t let your kids waste time on sports” is too general of a thing. I think that what’s probably the more valid advice is something like “Don’t expect a sport to guarantee you’ll get into college.”
When my kids were younger, they did year-round swimming. USA Swimming, not a local summer league. Massive time commitment. Practices 5 days a week, occasionally 6. 2 day, sometimes 2.5-3 day meets once a month. Some of those required travel with overnight stay. Swim meet fees. Swim team monthly dues. Tons of $$ spent on swim suits, goggles, swim caps, fins, the whole 9 yards. And don’t get me started on tech suits…literally hundreds of $$ for a suit that you wear only a couple of times in competition and then it rips.
Some of those swim parents were totally insane. Talking about how their 9-10 year old is going to be the next Missy Franklin and get a full ride scholarship to college.
Once you hit a certain age, then there’s practices twice a day…in the dark before the rest of the normal world wakes up and then at the end of the day after your school day is done. Spending 3-4 hours of your day swimming. And then do homework after that.
My kids dropped out of that when D24 was 12 and D26 was 10. D24 wanted to explore other interests and D26’s coach changed and the new coach told her that she was lazy and too slow (that woman was what I referred to as a long string of 4 letter words).
If my kids had stuck with swimming, would it have helped D24’s college applications? Maybe, maybe not. Who knows. It doesn’t really matter at this point. Did your son enjoy all of his years of participation in his sport? That’s more important than the temporary competition between him and his sibling in terms of who got into which school and all that.
Sometimes, the sports kids regret not having had the time to do anything else but their sport. Sometimes, they might regret not being good enough or not having the desire to play their sport in college. Sometimes that’s exacerbated by other adults or other students asking them “Oh, aren’t you playing Sport X in college?” Those people are only trying to make conversation, but they’re kind of clueless, so you just say something very generic and smile and nod.
Consider the speech & debate kids…there’s literally thousands of high schoolers in the US who are on a speech & debate team/club. Will this help them get into Harvard? No. Not unless they’re highly ranked in it at a national level. And then even just maybe it might give them an edge. It’s like reading tea leaves. Open to lots of interpretation.
Lots of colleges like to see that a student is able to commit to something longer term. That’s great. Your sporty kid definitely fits in that category.
Take my D26 by comparison. She’s floated around a few different extracurriculars, but hasn’t found one yet that she really loves. Tried robotics for 2 yr, learned that she pretty much hates the competition aspect of it and it didn’t help that the faculty advisor for the robotics club was pretty much useless and provided so advising or suggestions whatsoever. Robotics was a grind and for 3 months in a row, we were at Saturday all-day competitions and had no life other than that. Worse than monthly swim meets from ages ago.
This year, D26 switched to mock trial, has learned that mock trial, to her anyway, “feels like I’m having to take a whole extra class with homework and everything” and it “requires too much public speaking and you know how introverted I am.” Last weekend’s regional mock trial competition lasted from 7:30 am-6:00 pm. Not sure yet what other thing she will try instead next year, but I guarantee you it won’t be drama, musical theater, or performing arts. 
If your kid found an extracurricular that they actually enjoy, consider yourself blessed.
There’s a lot of different advice on this out there. There isn’t one single right answer, I think. So listen and consider the advice of one’s school counselor, but then go ahead and do what you feel works best for your family. 