Some of my fondest childhood memories involve conversations with peers from these walks. I think it's an incredible shame that I can't let my children do the same, even at 8, and even though my 8yo is miles more mature than I was at his age.
Where do you live? There are many, many places in the US where it is indeed usually the case. (Possibly depending on your definition of "far away")
(for the record: primary school encompasses what US calls elementary and middle schools here)
My very liberal definition of "far away" would probably be something like "more than 1.5km" (the distance I was going by foot to a swimming pool as a kid), more if we consider public transport and bikes too - though those of course won't necessarily be viable options everywhere and at every age.
at one point my oldest was in a school that did not allow kids to go to school or go home on their own. so in the afternoon i had to go to the school and pick him up. they would not let him leave until i showed up. however they could not force me to accompany him in the morning. because, well, what were they going to do when the kid was at the school gate and i wasn't there?