By the same definition every helicopter, plane, kid flying a drone, even car on the road is not “safe.”
It’s the same way I can call a system reliable when it is 3 9’s, but that doesn’t imply 100% guaranteed uptime. Or a statistician can reject a hypothesis that has a low enough p-value but still more than 0. Or how health systems and procedures are considered safe above a threshold, or how we consider condoms safe sex while understanding they are not 100% effective.
I’m finding it frustrating that when it comes to UFOs, people tend to isolate the most remote possibilities.
Please confirm the actual statement made.
No evidence of harm as of yet, or somesuch.