Mostly unrelated to the correctness of the article, but this feels like a bad argument. AFAIK, Anthropic/OpenAI/Google are not having issues with their weights being leaked (are they?). Why is it that Meta's model weights are?
It seems safe to assume that not all the companies doing leading-edge LLM’s have good security and that the industry as a whole isn’t set up to keep secrets for long. Things aren’t locked down to the level of classified research. And it sounds like Zuckerberg doesn’t want to play the game that way.
At the state level, China has independent AI research efforts and they’re going to figure it out. It’s largely a matter of timing, which could matter a lot.
There’s still an argument to be made against making proliferation too easy. Just because states have powerful weapons doesn’t mean you want them in the hands of people on the street.
The main threat actors there would be powerful nation-states, in which case they'd be unlikely to leak what they've taken.
It is a bad argument though, because one day possession of AI models (and associated resources) might confer great and dangerous power, and we can't just throw up our hands and say "welp, no point trying to protect this, might as well let everyone have it". I don't think that'll happen anytime soon, but I am personally somewhat in the AI doomer camp.