Sure, and like I said, it's just a mitigation. The real answer is that if you're a high value target you just shouldn't use LLMs.
...
"What do you mean we got hacked via our third party vendor because they use LLMs"
Remember this the next time a hype chaser trying to pin you down and sell you their latest ai product that you'll miss out on if you don't send them money in a few days.