You obviously did not grow up in the 1950s-60s.
When I was a kid, we were allowed to roam - especially on bikes. No parent had any degree of clue what we were doing.
I remember constantly jumping out of a high tree onto an old (no doubt disease-ridden) mattress in an abandoned secluded area. If any of us had gotten hurt, adult help was literally miles away.
Amazingly, we survived.
Yes, I grew up in the 1950s-60s and roamed ten miles on the bike in second grade and jumped out of second floor windows in houses under construction and rode dirt bikes on the street (still do) and a lot of other stuff. But no fit parent who is aware of the situation would allow her kids to play in a cloud of industrial fumigant.