Suppose you stepped aboard a city transit bus and the driver recited to you: "I must warn you, sir, there are risks to this ride. You may be tumbled about by the stops and starts; you may be abused by the other passengers, verbally or even physically; and you may even be robbed.
"Furthermore, the vehicle may be involved in an accident, get stalled on a railroad track, or even plunge into a river. Be careful lest things be spilled on you or you sit on gum or chocolate. Please sign this form that you understand these risks."
Predictably, it would be a long bus ride, if you took it at all, and absolutely no safer because of the information received.