I'm appalled to read about this. Firstly my sincere and heartfelt wishes go to the victims, their families and friends.
Nothing is deliberate, all were simply doing their best. I cannot abide this blame culture. Anyway this is my take..
A neuro surgeon once told me ' we know more about Mars than we do the brain'
Another told me ' treatment of Parkinson's is educated guess work. We do our best but we don't know'
2015 was a horrific year for me. I struggled with a mental breakdown caused by prescribed drugs.
I remain very cautious about our treatment options. I now take as few drugs as possible; those close to me will see the negative impact that decision has had on my physical status. However I'd rather keep my sanity, know who I am, have clear and rational thought than walk. That's my choice. Non invasive, non mind altering options are coming. Hang in, keep well, be brave. We can do this. We so can.