OK, just read in the local news speeding driver hits another driver. Another driver killed by someone disobeying the law. Don't tell me speed doesn't kill. Maybe you'd like to inform the deceased family that speed doesn't kill. I do not have the stats, only need to read the news on a daily basis.
OK, I will say it openly and directly -- speed does NOT kill. Human misjudgments are what kills people, not "speed". The sad truth is that you've bought into a catchy slogan, which is little more than that. It's true enough that when some idiot is running down a wet interstate at 90 on bald tires, and he kills someone, it's easy to say "speed kills". But speed didn't kill, the driver's horrible, criminal decision to select a speed that was unsafe is what actually killed.
And consider the flip side -- every year, a sad multitude of people are killed in very low speed accidents. A child gets backed over in a driveway. A mid-speed crash starts a fire that burns up a car's occupant. And so on. Shall we start a "slow kills" campaign too?
So no sir, speed does not kill. Bad judgment by humans does. Sloganism is a nice way of propagandizing the public to do one thing or another, but at the end of the day, it obscures the truth. Maybe the closest thing to the "speed kills" slogan that matches the truth would be, "driving at any speed, fast or slow, that doesn't match the conditions, kills". Sure, from an ad man's perspective, it's a poor "slogan," but it's much closer to the truth than "speed kills".