Yep - the very existence of a widespread concern that open sourcing would be counter to AI safety, and thus not "for the public benefit," would likely it very hard to find OpenAI in violation of that commitment. (Not a lawyer, not legal advice.)
IMO the only real involvement OpenAI has had in that movement is suddenly getting REAL hand-wringy Infront of Congress about how dangerous AI is the moment OpenAI no longer held the only set of keys to the kingdom.