If a family is struggling for money, a 15-18 year old might have a job after school that actually contributes to the overall family income. Or, at least helps take care of that kid alone. Playing sports for free can be an issue.
A big one that seems to be overlooked is transportation. City or rural... if you rely on the public transportation (either city or school provided)... getting home from practice may benefit from friends or coaches that can drive players home. But, is that something they can rely on or rather would they go into sports KNOWING they need to rely on friends or coaches to give them those rides EVERY day they have practice or games.
At least in a city you might be able to walk home if the situation and neighborhood isn't bad. Rural? You could be hours away if you had to walk. It's just a no-go. And yes, they can get rides... but it's tough to even start an after school activity when you know day one you have to ask someone to give you a ride home.
"Getting rides" was necessary and done by us small town hicks 45 years ago - my freshman and sophomore teammates lined up rides with older teammates for whom our dropoff was "on the way." We helped pay gas money (among other things) in exchange. The hardest part actually was getting rides home after games on Friday or Saturday night (we played our home games at a local stadium but had to go back to the HS to shower, etc.)! As noted in the "low score thread" - I am OLD! Come to think of it, I actually rode a bike to 2-a-days most of freshman year. I didn't yet know anyone on the team who drove (that changed by the time 2-a-days ended), my dad was running his business during the day and mom was tending to 4 younger siblings. I would not have dreamed of any other way (and they didn't either). But that sounds like I walked to school through 6 feet of snow and -12 temperatures... lol.
So on the one hand, we can say "get a ride." .....On the other hand, 30 years later my kid wasn't permitted by her mother to walk 6 blocks to school - it might not be safe (not my stance, drove me nuts). And my kid's friends, classmates and/or teammates had the same parental oversight - they were not permitted to walk. And they didn't share rides - a parent almost ALWAYS picked each one of them up separately- otherwise you weren't a good attentive parent and take that 10 minutes to bond (do I sound like a bitter NIMBY?)
And that was 10-15 years ago. So maybe the helicopter-parenting syndrome (but not in the MAC, lol!) is part (although probably not a predominant) explanation for declining participation in school sports today. It's somewhat counter-intuitive that a parent can/will provide rides with a grade school/junior high travel league or rec league soccer practice that takes place in the evening (and not every day), regardless of socio-economic status ---in sports that those of us here think of as secondary. Whereas by the time kids reach high school, most parents' work schedules do not mesh so well with varsity football and basketball practices (or any other sport/co-curricular activity) that usually occur right after school, every day, and end before many parents are off from work. Those of us on this thread cannot imagine that varsity football wouldn't be a hugely greater priority than grade school rec league soccer. But for many parents/families, the rec league soccer is more important to their kids' development than HS football or any other HS sport. I don't agree with that take, but many families follow that logic.
After-school jobs are part of the reason too. But there are probably 50 factors. From my perspective, the biggest factor, by far, is the cell-phone/ipad. Kids don't need to socialize in-person (and that socialization was part of the allure of sports in my day). Instead, texting, Instagram, emails all suffice for interpersonal communication. Yes, the high-end athlete uses those technological tools to promote themselves, their teams, etc... but for the 95% who are not elite athletes or in a culture like the MAC (which is the exception and not the norm), technology is not a tool to use to supplement athletics and other social activities. For those 95%, technology is THE social activity.
Don't blame the kids - somehow this happened on our watch.