I think the problem "de-risking" childhood is only an instance of the bigger problem of what Roger Scruton calls "Risk De-aggregation". Risk Deaggregation is taking a single point of risk (and its associated metric), and optimizing to reduce that risk as if it exists in isolation from other risks. I.e. Risk occurs in aggregate, not as individual threats. Risk deaggregation happens everywhere from Climate Change polic…
Legible risks are mostly "heuristic 1." They can be measured, quantified, discussed in discrete terms. You can be yelled at over legible things, like ignoring stranger danger on a subway. It's harder to yell about nuance.
Illegible things are less discrete. The consequences, some hard to describe, many unknown, of growing up without freedom and self reliance. There are dangers here too, but they're more nebulous.
It's hard to justify, externally, a trade-off between illegible gains like building a personality and legible dangers like kidnapping. Hard, but not impossible.