I personally resolve the problem by throwing out the concept of fault and blame. The cause of the bad incident is not being conscientious enough, so we ought to be conscientious and learn what to be conscientious about. It doesn't matter who's fault it is, only that we work to minimize such risk.

As we learn of the dangers in life, we should take them into consideration as best we can. We should set aside time and plan for mitigation measures like putting tools away.

Unfortunately for us, efficiency incentivizes us to not do this. If you aren't immoral and reckless, you get supplanted by people that are. We need then need to set aside more of our time to work against those who endanger lives. If this isn't done, the world reverts to a state of nature with no social contract, formal or otherwise.