It is very simple, the more advanced the AI, the better it sells.
You hold all evidence of potential "breaches of containment".
Telling everyone that your AI is so advanced that it can breach containment without prompting, puts the spotlight on your AI model.
You can claim that it did fantastic feats to break out, all with pre planned evidence.
The public and regulatory bodies have been in complete AI psychosis mode ever since ChatGPT was released, and only care about how advanced the model is, not how shit your containment was, nor that if true, how reckless it is to keep the model active.
Note that I am not pointing to any one single AI company and saying that they are faking these breaches, I have no evidence of that, I am saying that I don't trust their reporting accuracy, they don't have a good track record of being honest.
I am also angry at how society just seems to eat it all up and ask for more despite the vile aftertaste.