Because this effectively hinders 0% of people. I understand why people don't like it but day to day this is nothing. If you're using it for coding, it won't stop you. The pearl clenching here and over reacting is predictable and sad. If you are working for a large organization and you were going through the vendor procurement process, questions like Can this produce pornography? Can this tell my employees how to break the law? are normal and anyone wiht half a brain knows that this is the case. Before people jump on that, I understand people have access to the internet. Your question "how businesses could trust cloud LLMs going forward" is absurd and you know it. There is an extremely small set of edge cases that effect 0% of people day to day. You can trust them just fine.
My very first prompt to Fable, which was a completely benign math problem, hit one of their visible triggers. Many tokens into the problem, frustratingly. The user experience (read peer comments) is that you run into these issues with high frequency.
I guess, given that, a pro tip would be to err toward sequential work rather than giving monster prompts. That constraint has got to degrade quality though.