Because they could have also have organized a less strenous event and it may not have resulted in any unnecessary death. And they still achieve whatever objective that they had in the first place eg. donation, community spirit etc.
Like I said, a 1km run may be more ok and for the willing participants, they could continue for a few more rounds rather than one big round of 5 km which is quite strenous. People tend to have big egoes. They always want to complete their rounds.
I always like the 80 / 20 rule. 80% of the blame on the Participant. 20% of the responsibility with the organisers.
Using the same argument , why not organise a 10km run and also dont take responsibility for the few more deaths that occur on that day ?
![Razz :P](./images/smilies/icon_razz.gif)
Or those TV Game Shows or Super Sales, where thousands of people rush in and a few get trampled to death in the process. No need to also take responsibility. Only the participants to blame, right ?
It's all about "how much you made when you were right" & "how little you lost when you were wrong"