I don't disagree. My comment was saying a healthier balance is what I would prefer when my kids are a bit older. That article fails to be well-rounded and only focuses on proving their hypothesis versus presenting data in an objective manner. For example:

The answer lies in expectations. Parents today receive constant messaging that in order to be “good parents”, they must always keep their children safe. And it is widely believed that the world is no longer a safe place for children to play in. Yet statistics show that it has never been a safer time to be a child. Injury-related deaths are at an all-time low in most Western nations. In the US, deaths from unintentional injuries fell by 73% for boys and 85% for girls between 1973 and 2010. This misperception of risk creates the parental paradox.

Yet just a bit earlier in the article, she mentions this:

Every successive generation of children since the 1970s has seen their outdoor play and freedom shrink. Time use data show that children’s leisure time has gone down, particularly time spent in unstructured outdoor play, while time spent in academic and screen-based activities has increased. Between 1975 and 2015, outdoor play among UK children decreased by 29.4%, while screen-based activities increased by 22.4%. In the U.S., only 16% of children in 1997 played outdoors every day. By 2003—just six years later—that dropped even further to 10%.

So how can they rule out that it's safer now because the amount of kids engaging in unsupervised, dangerous/risky activities is the lowest it's ever been? (As a side note: In the US, I think she also ignores the very real financial problems with serious injuries. A medical bill for a broken bone or other serious injury can cost some families tens of thousands of dollars without insurance. Back in the 60s/70s and earlier, medical bills were way, way more affordable than now.)

There are other problems, as well. She seems to only focus on "intensive parenting" and showing that structured activities are a negative thing. Whereas articles like this, https://parenthetical.wisc.edu/2017/01/23/acing-afterschool-making-extracurricular-activities-work-for-your-teen/ , argue that structured activities can be beneficial, too. Later near the end she does discuss simply prioritizing it versus going all in, but the way it's presented throughout the rest of the article makes it seem like structured activities are entirely a negative thing and unsupervised, unstructured activities is the best way for kids to thrive.

Anyway, I'm an advocate for simply striking a healthy balance between the two: Don't overburden your kids with supervised, structured activities, and don't let them become feral by completely going hands-off with their free time. In other words, gently guide, mentor, and support them. :)