Rural communities don't need to be walkable. I would regularly bike 5+ miles to visit my friends in our rural area (all farm country) and did so about as soon as I learned to ride a bike (6 or 7 years old). Kids biking wherever they wanted to go was very common. So was riding ATV's when they got to be preteens.
In rural communities, parents aren't always chaperoning and shuttling their kids everywhere. You're given a lot more freedom as a child.
How long ago was this? If you had freedom as a child, it might have been because of the time rather than the place. I was a kid in a rural area in the 2000s, and there was exactly one time in my entire childhood when I saw another kid that I knew outside of school without my parents having arranged it and having driven me somewhere. If I went for a walk alone, people driving past would stop and ask me if I was lost and needed help. Actually, that happened last time I was at my parents' home even though I'm in my 20s. I felt lonely and isolated growing up, and I still feel developmentally stunted from it.
In rural communities, parents aren't always chaperoning and shuttling their kids everywhere. You're given a lot more freedom as a child.