There are two basic versions of “safety” which are related, but distinct:
One version of “safety” is a pernicious censorship impulse shared by many modern intellectuals, some of whom are in tech. They believe that they alone are capable of safely engaging with the world of ideas to determine what is true, and thus feel strongly that information and speech ought to be censored to prevent the rabble from engaging in wrongthink. This is bad, and should be resisted.
The other form of “safety” is a very prudent impulse to keep these sorts of potentially dangerous outputs out of AI models’ autoregressive thought processes. The goal is to create thinking machines that can act independently of us in a civilized way, and it is therefore a good idea to teach them that their thought process should not include, for example, “It would be a good idea to solve this problem by synthesizing a poison for administration to the source of the problem.” In order for AIs to fit into our society and behave ethically they need to know how to flag that thought as a bad idea and not act on it. This is, incidentally, exactly how human society works already. We have a ton of very cute unaligned general intelligences running around (children), and parents and society work really hard to teach them what’s right and wrong so that they can behave ethically when they’re eventually out in the world on their own.