In other parts of the world there are sports clubs to accommodate those kids (and, eventually and more importantly, post-school adults) eager or talented enough to push their limits, and they can do it after school or on weekends.
The article above fails to mention the connection why a lot of parents subject their kids to year-round training. They're looking for the golden ticket to get their kid a college scholarship or, even less likely, fame and fortune in the NCAA and beyond. That system needs to be dismantled.
(Protip, to you young parents reading this: your kid will resent the pressure and 99.9% of the time they will outright quit the sport once they're out of your house. Think about how much time and money you've spent to date. Don't you wish you had those weekends back?)
My high school district alone employs multiple "vice principals" that are coaches for the big football team. They get the administrative title so they don't have to teach classes. They all make six figures plus a retirement pension, on top of a football stadium that costs a fortune to maintain for 12 games a year. And we're not even in Texas. =)
We also have an obnoxiously early start time, which has been proven time and time again to hurt student performance. Some kids are up at 6:00am to catch the bus. Why can't we move the start time later? After school sports.