[gxon]

This is a problem for both the people who are and are not interested in participating in extreme behavior.

Those who are will more likely have a false sense of lower risk than their actions would subject them to. Those who aren't might be scared away by a larger value than they would actually be subject to.

This could even become a self fulfilling prophecy where activities with high average micromorts will only attract people more willing to engage in risky behavior, thus inflating the tail of extreme behavior that causes most of the mortality, increasing the activity's average micromorts over time.