My point is that even if all of it were in place, LLMs with any reasonable harness would still be dangerous. Not to belabour the analogy, but while deaths per km travelled have decreased a lot for cars with better safeguards, cars still kill a million people per year.
Your initial argument of "it's just the harness/user" is wrong; reasoning LLMs are inherently dangerous unless locked in an unbreakable box, which is tantamount to not using them at all. We can make them safe_r_ with better tooling, but they can't be made safe.