That's a relative measure, it could still be the case that the absolute risk is still quite low for each individual. It could very well be the case that the risk per individual is low enough to not cause serious rational concern, while the risk for the entire fleet is high enough to justify grounding it. In much the same way that golfing during a rain storm almost certainly will not get you killed, but if it became a trendy thing to do the number of people being struck by lightning would be significantly higher.
To put a finer point on it, I believe a 737-MAX is still safer than general aviation, which I think most rational people aren't scared of.
I become increasingly anxious of flying based on the size of the aircraft, not sure that I'm an outlier there. The smaller the aircraft the less stable the flight will be, which is what most people are afraid of while flying.
To put a finer point on it, I believe a 737-MAX is still safer than general aviation, which I think most rational people aren't scared of.
https://en.wikipedia.org/wiki/General_aviation#Safety