There are a lot of difficult non-obvieous things to watch for and know. It's like an old cardiac surgeon told me, he can walk into a room and know from across

There are a lot of difficult non-obvieous things to watch for and know. It's like an old cardiac surgeon told me, he can walk into a room and know from across the room if the patient has high blood pressure, is this, is that, just by their coloring etc. It's the same way watching the experienced surgeons do their work, they know so much about a patient just by looking around inside, this means that, etc. Wisdom. To answer your question, basic surgury isn't (difficult). Good medicine is. The more complex the issue, the better medicine you need.