My kids learned teamwork without ever playing a team sport. Had zero interest in them (my wife doesn’t either). Very active family. Just not team sports. I think we overstate the value of sports for a variety of reasons.
My son had traditional gym freshman year of high school. Despised each and every second of it. Sophomore year he did gym self study. Worked out a cardio/strength training plan, had to document it and progress made over time and wrote a couple of short research papers on various health related topics. He turned in a binder full of info on which he was graded. That binder became (unbeknownst to us) a guide for other kids in the school. Several parents came up to us and thanked us for the template which their kids used for their own self study program.
On occasion he will still exercise (with what he learned in self study) though not as often as he should. But put a badminton, volleyball or basketball club in his very apartment and have the start and end times begin/end on his arrival and he won’t participate. Ever. My daughter skipped gym in high school because she was in the marching band. She is very active and gets exercise through other means. Don’t think they are unique at all.
Reality is ability to exercise will be easier for some people after high school/college than others. Certain parts of the country have various leagues, exercise groups, etc. But others do not. Same is true of finding places to put up equipment and find people to play.
Time is also an issue. Two young professionals working a ton of hours likely will not have time to go to leagues and play sports. More true of parents with young kids and a house. “Where there is a will, there’s a way?” Thats the exact opposite of what we want. We want to find ways to make it easier not to show how much you want to earn it.
And how about weather? Winters are tough in many parts of the country. People tend to hibernate more than anything. And this spring/summer, its been raining a ton. Pretty much every day.
And at some point from what I have seen, people drop out of the competitive sports clubs for fear of injuries. 35-40 seems to be what I see in terms of sports like basketball. Snow skiing seems to be 45-50. People don’t have the time to get there early enough to stretch/warm up. And fear they will blow out a knee or something else. To me, I know people who have messed up their knees walking down steps. My dad snow skied until he was 75+ so I have a while to go. And I have a basketball hoop in the driveway which for me. Son and wife never use it. Daughter will but only to play Horse will crazy rules (not only does shot count and need to be replicated but number of dribbles, time spent standing still, etc. needs to be duplicated as well. No real aerobic benefit at the end of the day but a lot of fun with my daughter.
No doubt there are people who keep playing sports for exercise. Last I heard my little league coach still played competitive baseball in his mid 70s. 50 year old league kicked him out and told him to play with the 40 year olds because no one could hit his pitching.
Guess my point is what works for some/many doesn’t work for all (particularly not at all times in their lives). More options is better.