At the risk of being branded insensitive, I do have to agree with this sentiment. My view on Aaron's suicide is much the same as that of the nurse Jacintha Saldanha last month [1].
In both cases, these people were subjected to incredible stress and anguish by external forces, but crucially, the reasonable person could not have predicted their response to these pressures would have been to take their own lives.
Aaron wasn't on suicide watch. Nobody foresaw this.