There's a significant difference between "not unsafe" and Safe. Most of life is spent in that limbo, for most people, where you're not convinced that you're in danger, you may not be feeling the prickle of intuition telling you that something or someone is waiting to spring, but you don't know heart-certain that you're Safe.
It's easy to mistake "not unsafe" for Safe. It's easy to mistake an ignorance of danger for safety.
The feeling of complete safety is addictive, and can be illusory, but it's special when it does occur.