Speed does not kill (even a Chief Constable admitted this- I forget which one), it is irresponsible use of speed that is dangerous and exacerbates accidents.
That's about as clever as saying "Guns don't kill people. People kill people"
Fact is, the slower you go, the more time you have to react safely to a given situation. By extension, many road deaths could have been avoided if the driver wasn't going so fast. End of story.
If you can't monitor your speed and the road conditions/limits yourself, then shouldn't be on the road fact.
But that's just the problem. A lot of people
think they can limit themselves correctly according to road conditions etc. Unfortunately, they're not always right.