Yes, speeding is going 46mph on Rt 235, this is true. You can think that this causes a lot of accidents all you want, you are entitled to your opinion, but you are not entitled to your own facts. And the studies say that speeding isn't the issue in the great majority of crashes, that not driving properly, that's the problem.
If I stay in my lane, yield when I am supposed to, maintain a safe following distance, pay proper attention, and follow traffic signals, then no matter my speed, within reason, I simply will not crash. To a point of course, if I travel at 130mph down 235, thats going to result in a crash. But very few folks do that. This is the difference between a factor and a cause. Remove a cause, say failure to yield, and the crash doesn't happen. Remove a factor, and the crash still happens, but the outcome is changed. Say from a 55mph t-bone to a 45mph t-bone.
Me, I'll take no t-bone for $500, every damn time.