Doctors shouldn't ever get sued. The idea of an "individual doctor" is such a 19th century concept. They're gears in a machine- the hospitals. An ideal hospital would never get sued because it performs very well. Instead, hospitals try to never get sued but do not perform very well, because it's cheaper to avoid litigation than it is to improve performance. Improving performance could be incentivized by open transparency, pricing, and competition but they have a local monopoly, so there's no point.