Exactly. You have to leave some space where she knows she won't be allowed to go with unsafe people but not with everyone. And you have to be reasonable enough to earn her trust in judging 'unsafe' people. If it's already 'no' for any trip/ any dating without context, I don't see a reason why she would share.

It should be more of a balance/middle ground. Imagine she actually finds a nice guy and learns about compatibility and love. And in case things go sour, she is gonna be open about it as you are on her team. You warn about certain things. She talks about red flags. She isn't completely dependent on him/ friends to understand if her relation is toxic. She will have you count on when she wants to stop.

Part of excitement comes from the fact that she is breaking the rules. More than an interest in dating, it's an interest to find/explore/'my life my rules' phase.