Good grief. Talk about sweeping generalisations!
"or attempt something dangerous, or suffer depression or emotional difficulties from being alone for so long every day."
Not necessarily. Depends on the age. Depends on the child.
It does sound too young. Neglectful really. And for too long. All day? All summer?
I now see this relates to some 80's nostalgia!
Plus areas are different. They can walk home in year 5 here, and it's encouraged in year 6, in preparation for secondary.
Some kids are very timid. My Ds2 is a bit older, but he's been confident since he was born! Plus as a second child he's always wanted to do this early, promoted partly by having an older brother.
I know many parents from school and football teams. Most of their children are very timid, some anxious.
It depends if you've built them up gradually.
We've been building Ds2 up for years. First it was a few minutes whilst I nipped to our garage to put oil in the car, then I nipped to post a letter, then food shopping. Then I went to work for 1/2 a day. He cooked himself lunch and was totally happy. He loved being at home on his own and was very excited and proud.
All this instant dismissal of kids not being able to do it, is over-anxious parenting. We've swung from more than just benign/neglect in the 80's to paranoid cotton wooling in the 20's!
Shame we can't swing back to half way to redress the balance!