I don't think it's a coincidence that the rise in hyper-protective parenting has arisen around the era of self validation by other neuortic people on social media. When names of children succumbing to tragic events are cited, the events are so anomalous and unlikely that they are from 15, 20, nearly 30 years ago.
As an 80s kid our weekly routine involved trawling the little shops on a Saturday, then I'd be locked into the car forever (probably about half an hour, it wasn't short) while my dad went into the bookies. Every week. I can't remember when this routine started but I think it was well established by 5, and was certainly long running before we moved when I was 7. And week after week I'd sit there learning the lyrics to Chris DeBurg from the cassette inlay card, or reasing the Readers Digest Atlas driving tips, how to load your roof rack, aquaplaning etc. This routine continued for years until he died when I was 11, hundreds and hundreds of Saturdays and absolutely nothing happened!
When my two were baby/ toddler it was such an ordeal trying to herd them out that I did sometimes sneak to the postbox for 5 minutes rather than an hour's ordeal of shitting through nappies/ clothes, feeds, sensory melydowns over getting dressed etc. Far simpler to make the most of their lengthy naps and check the house was unlikely to spontaneously combust within a 5 minute timeframe. I remember trying to do it with DS1 on a scooter when he was 4 and the 5 minute errand took an earsplitting 30 minutes for all his furore about getting out and scooting uphill and anything else that can possibly aggravate him.
Just before lockdown I asked another youth group leader when she thought DS (9) would be OK not to be lugged out the 300m down the road for 90 minutes. She works in child safeguarding and said he'd be fine now. He has a landline, I have the mobile, either he or I can run to each other in 3-4 mins, he knows the emergency exits and he's the type of child who will just sit on the sofa and Minecraft and be surprised that you've announced you're home as he didn't register you'd left 90 minutes earlier.