If there's good enough evidence that we're safe enough as we are, I think it's possible to say it without knowing what the current precautions are. (Just as someone can say "my computer is fast enough for what I use it for" even if they have no idea of its clock speed, memory latency, instruction set architecture, etc.)
I know what I would expect to observe if my computer weren't fast enough (even in the absence of looking at technical specs), but I don't know what I would expect to notice if I were safe in the absence of actually looking at the precautions that are being taken.
The closest thing I can come to that is observing that nothing disastrous has happened yet, but that's not especially well-correlated with actual safety.
So... what kind of evidence are you envisioning here?
Another month, another rationality quotes thread. The rules are: