This is misinterpreting what I'm saying. I'm not arguing for the safety of Tesla's system. I'm saying that judging the safety based off of corporate marketing decisions is a mistake and putting a guarantee on a product is a marketing decision.
Even if this originated as a marketing thought bubble, there's no way that such a decision could've been made without direct approval from the executive (including the CEO), and only after taking advice from their general counsel and consulting with the board. The potential reputational damage is too immense for such a decision to be made by "marketing" alone. What you're describing has happened before and the courts awarded massive punitive damages against the motor company.
Tesla will not - it will blame the human driver for not paying attention. That's the difference.