Atenco Yoda I think you are right. I remember walking to school on my own, main roads, through a cut, 4 miles. No adult in sight.
I did that when I form when I was about 4 or 5, in 3 different cities I did not know well (we moved a lot) and continued to do so until I was 12 and caught the school bus.
I am of the generation when your mum opened the door in the morning and didn't expect to see you until tea time, apart from flying visits for the loo, a bite to eat at lunch time or to put a plaster on whatever had got a scratch. No watches, no adults, no phones, no real restrictions... I know we were surrounded by other mums (sign of the times) but we were free / feral and learned our own limitations.
I appreciate the difference in traffic levels, immediacy of news sharing and the incredible rise of the 'blame and shame' culture... but I really don't think it is doing kids any real favours.
I say that as one who spent decades teaching 16 - 19 year olds... noticing how much more molly coddling they needed, how much responsibility they lost, and the equivalent loss of independence and self belief.
Sad, as they have so many more opportunities these days. But we seem to have infantilised them out of a lot of 'derring do' and independence.