It’s not a matter of good or bad, but a choice among alternatives? Nobody gets fired: learning opportunity for next time, but little direct incentive to improv

It’s not a matter of good or bad, but a choice among alternatives? Nobody gets fired: learning opportunity for next time, but little direct incentive to improve. Fire someone: accountability theater (who is really responsible), loss of knowledge. AFAIK, blameless postmortems and a focus on mechanisms to prevent repeats seems like the best we’ve come up with?