I hate all the internet shaming that goes into this.
Everyone on the internet feels that they get to judge a parent's parenting ability.
Some kids are more responsible than others.
I was handling myself at age 6 in Europe. I was navigating public busses from age 6 on.
I have had police officers tell me I am putting my own kids in danger by leaving them alone in a car.... when they were 8 and 7 years old (and in front of my house).
The police officer couldn't even articulate what the exact danger was.