Was very normal. I think you must live in a very sheltered corner of Ireland.
@pointythings Where we live, the nearest public bus stop is 15km away on a busy road with no hard shoulder, cycle lane or footpath. The nearest shop (and DS's school) to our house is 6km away, on a similar road. The only cyclists you see on those roads are the adults in lycra who cycle mostly in a group
To give you an idea of how isolated we are, when I put the bins out, the nearest collection point for our bins is 750m from our house. Even Tesco stops delivering about a mile away from my house!
I leave at 7.45am, and get home at 6.45 if traffic is good. I work 50km away in the nearest big town. Most families around have one parent doing likewise. School holidays are 9 weeks long for primary, and 12 or 13 for post-primary.
My city based colleague's kid was walking home from age 9 and letting himself in. But she got home an hour later, and if anything happened she was a 5 or 10 min drive from home. He could safely walk to the shop at the top of their street to get milk and home - even in winter because there's streetlights and people around. In the summer he could walk to various city summer camps and call in to his mum at work if he needed money or whatever.
I don't think it's an either/or. I'm no more protective of DS than my colleague was of hers, but what does make a big difference is the location and the amenities.