If speed kills then Im sure the Autobahn would have be renamed to "Highway to Hell" by now.
Speeding is a hazard in SA that will increase your risk because of exposure factors that are better controlled in Germany. Here in SA, you are exposed to more factors like unroadworthy vehicles, other reckless motorists, poor conditions of our roads, stray animals etc. If there was discipline on SA roads in controlling those factors, speeding would not necessarily increase the Risk.
If people want to experience driving adrenalin in a better controlled environment, go to a race track or closed drag racing strip.