I dunno, man, at the age of 6 my daughter decided to get up early one Saturday morning and go wander to the forest half a mile away. When she got back we set the ground rules (1) no leaving the house without telling us where you're going (2) no crossing streets with traffic lights without a grownup around (this limits her to about a 3 block radius). When COVID hit and she ended up at home ALL THE TIME I bought a pair of shitty walkie talkies so she could stomp around with the neighbor kids without me needing to keep an eye on her.
I have used "if I was good to do it, she's good to do it" as my operating principle since (1) the world is hella safer (2) she has a much better safety net than I ever did. I think a lot of today's child-rearing problems come from visible hypocrisy.