The are a lot of sources of error in the system other than long duty hours for residents and alternatives e.g. shorter duty hours introduce error at other point

The are a lot of sources of error in the system other than long duty hours for residents and alternatives e.g. shorter duty hours introduce error at other points and individuals in healthcare. Should something be done? Sure, reducing error is obviously good but its simplistic to attribute it to this or think alternatives aren't worse. I personally also think the trend shorter duty hours in medical school and residency when you have that support is it's own problem of not learning enough to be as competent (and at the expense of career longevity for practicing physicians as inevitably all that gets dumped on the attending).