We are already preventing 99% of preventable deaths. As you say, most ‘preventable deaths’ we prevent just turn into a new later more creative preventable death. In many cities you can be homeless and have better mortality prevention than a medieval king.

I don’t know how people think that we’ll draw a line somewhere clear. It is (and should always be) a moving target.

I think most progress has this moving goalpost. Because of this, we need to multitask as a civilization. We can’t just focus on ‘safety is number 1’… because we’ll never do anything else.