For instance in the US today childhood injury and fatality rates have plummeted [1]. And this seems like an obviously good thing. And one might reasonably hypothesize that the increase in rules and regulations against letting children play independently, as well as the rise of helicopter parenting has played some substantial role in this. Since it's very easy to see the link there.

Yet at the same time other factors such such as childhood mental illness, obesity, and other major issues have sharply increased. Relative academic results are down and even IQ levels are declining. Are these linked to the behaviors that have driven the decrease in injuries in fatalities? Well that's a lot harder to say, though I think it's a very reasonable hypothesis that at least some of these issues are linked with the same behaviors that have reduced childhood injury/mortality rates.

This is a recurring pattern in many things. Our understanding of the causality of genetics right now is essentially 0 keeping in mind that saying gene A 'causes' effect B is no more a meaningful understanding of the reason for the causality there than saying rain clouds cause rain.

[1] - https://www.childtrends.org/?indicators=unintentional-injuri...