If the car avoids 99% of crashes, but crashes happen 1% of the time, and it causes crashes 1% of the time, then it's making you less safe. Those are just arbit

If the car avoids 99% of crashes, but crashes happen 1% of the time, and it causes crashes 1% of the time, then it's making you less safe. Those are just arbitrary numbers and a simplistic framework, but the point is, you can have a huge increase in safety by the numbers, and a very small increase in problems due to the safety system that cancel it out, because the prior underlying rate of crashes was pretty small. I think this is an abstract pattern that comes up in other contexts and it doesn't seem to be intuitive.