I an an RN and I work with the IT department and as a regular staff nurse at my hospital and one of the biggest battles we fight is reminding people that the computer does not take the place of critical thinking, being careful and paying attention to what you are doing.
Properly utilized, the computer can be a godsend. The orders entered are clear, concise and legible (no trying to figure out MD's chicken scratch anymore) but the onus is on the ordering MD/PA/APRN to choose the correct order or group of orders. The onus us secondarily on the nurses/therapists/pharmacists who check and/or carry out the orders to question anything that seems unusual and to step back and research if a patient says "This seems wrong" or "The dovtor told me this but you are doing that".
As a nurse, I can tell you that no one goes into work trying to injure or harm someone. It's not a goal of ours. Yes, there are bad healthcare people, just like there are bad teachers, lawyers, bankers, cops, firemen etc...but the majority of healthcare workers TRY to do good things for people. But we are human, and mistakes will be made and one just hopes that the mistake does not cause undue harm. It is pretty much every healthcare person's nightmare to harm a patient. Generally, when an error occurs, it is because a system boke down, not because a worker had decided to intentionally harm someone.
At my hospital, we are contantly looking at ways to improve systems so that we lessen the number of errors...in the past few years we have done a good job of using checklists etc. so that every person does the same process the same way (ie- a pre-operative checklist to make sure all aspects required to be in place prior to surgery are in place). Healthcare is taking a lot of cues from aviation, where there are very few errors despite being a high risk field.
I always get sad when our "human-ness" gets in the way of successfully helping a patient.