Saying speed is found as a factor in around 30% of fatal crashes doesn't really say much as to the effectiveness of these sorts of measures. I mean, right off the bat I have to ask - what is the overlap between "people in fatal crashes with speed as a factor" and "people who receive automated speeding tickets".

I think as a percentage it would be unimaginably tiny which supports the assertion that it is misplaced enforcement if safety is actually the goal.