That's the thing though, life is about tradeoffs. How much does the kid really love the sport compared to how badly do they want to get into a super-competitive school? Yes, there is a risk that they play the game and still don't get in but is the risk worth the reward to that specific kid?
You never really know what a kid has in their application. And many families are hiring consultants to guide kids on what activities they should engage in and then what they should put in their application. There are a lot of kids in our area whose parents hired consultants but they don't talk about it. Only people close to their family know. We learned that too late. But now we know. It may still be true that, at some ivies, a well crafted application and essay can still get a really good student in without other hooks. But the number of schools and kids this applies to shrinks rapidly every year. Of all the kids I know that got into the very top schools, they were either recruited athletes, won the national spelling bee, were diagnosed with Autism, were minorities, raised a ton of money for flood victims in a third world country, worked as an intern for a senator or volunteered at a strategically selected charity. In other words, there is something they used as a hook of sorts. Hell, even the spelling bee kid got rejected to most of the very top schools.