At this point in history, both personal and community history, we face many questions about what makes us feel safe. It’s worth pointing out that most of the time when we feel like we’re not safe, we are in fact perfectly safe. Based on this, the idea or thought form of safety is more important than the reality.
It would seem that you’re being shown the threshold you can (must?) cross into a new phase of life, and also the best strategy for doing so. It’s likely this is being shown by another person, or through a relationship dynamic — possibly even through confrontation, though it could feel more like a dance.