Just to play devil’s advocate, I can imagine a game theoretic scenario in which revealing what we know about let’s say a deliberate cryptographic vulnerability

Just to play devil’s advocate, I can imagine a game theoretic scenario in which revealing what we know about let’s say a deliberate cryptographic vulnerability will potentially make the other party switch to another vulnerability we don’t know, or reveal our capabilities in discovering the specific class of such vulnerabilities, therefore withholding information is advantageous. I.e they can’t go “nobody tell China, but this is the precise reason” in certain scenarios. Not saying that is necessarily the case here, but definitely a possibility.