We have just convinced ourselves it is statistically safe, much like most of medicine. Most drugs are not made from molecular simulation of an entire human body.
Of course we have also convinced ourselves before that cocaine in drinks, lead in petrol, asbestos in walls… were all safe…
This reminds me of the Feynman interview where the interviewer asks "how do magnets work" and he goes on this rant of how that's unanswerable and you have to decide on what is it you really want to ask. You can't expect to know the full chain of knowledge because at some point you will be asking about quarks and gluons and then hit a wall where "nobody knows". Similarly you cannot simply just give up any investigation at all because then you'll end up recommending people to put lead in their cars.
Of course we have also convinced ourselves before that cocaine in drinks, lead in petrol, asbestos in walls… were all safe…
This reminds me of the Feynman interview where the interviewer asks "how do magnets work" and he goes on this rant of how that's unanswerable and you have to decide on what is it you really want to ask. You can't expect to know the full chain of knowledge because at some point you will be asking about quarks and gluons and then hit a wall where "nobody knows". Similarly you cannot simply just give up any investigation at all because then you'll end up recommending people to put lead in their cars.