This worked well in 1950s Britain because they had exterminated all large predators! Let's be real about that. For most of human history, nature was deadly.
I wouldn't tell a toddler to go play in the woods, you are correct about that, but the rest of us freely wander nature without fretting too much over it. I also just checked and there have been zero wolf attacks on humans in my state. Ever. We just aren't their preferred targets.
From what i've read, lethal wolf attacks in premodern Europe, even up to the late 18th century, were extremely common and claimed hundreds of human lives per year. Predators are predators. They stop attacking easy prey only if they're forcefully habituated into not doing so, not because they've become more warm, fuzzy and calm.
1. Humans have spent centuries exterminating wolves anywhere humans regularly go.
2. Humans adapt their behavior to minimize the risk of attack by wild predators.
This is like saying "relatively few people get mugged wandering around alone in the tenderloin at 3am". It's because everyone knows it's a terrible idea and avoids doing so. That doesn't make the area safe.