We need to introduce the concept of exposure here. If 1% of vehicle drivers die in accidents when they use those vehicles for 1hr per day, every day for their whole lives, that is still safer than if .01% of rollercoaster riders die, when they ride for a few minutes each time, a few times during their lifetime. It's about risk. If you're exposed to a small risk over a long time, it's still a small risk. You need to control for that by looking at things like # of trips, trip duration, etc.