Whoa, whoa, whoa -- there's one thing I think folks are forgetting here. The reason people are promoted to positions of leadership aren't because they're the smartest or the cleverest, but because they are *really good leaders*. The one thing that Keller has been absolutely consistent on is her leadership. The people in that infirmary follow her orders instantly and clearly respect her. THAT'S why Elizabeth put her in that role. When she's there, she commands all of the people around her, and I've never seen her uncertain in that role. Being a good leader is a huge part of being the head of a department. So, yes, there are lots of great surgeons, there are lots of bad surgeons, but being the head of a department is about you're ability to command your peers, and she has never shown any issues in that regard (except for that private moment of self-doubt with Elizabeth).

Also, huge load of assumptions about whether she is experienced or not. You're basing that purely on her *age*, whereas, based on her skill set (namely, being capable of performing brain surgery), she's more than experienced. You don't graduate from medical school and suddenly becoming a qualified neurosurgeon. My brother is one, and it took him close to 15 years to get to the point where he could perform that sort of surgery on his own. She is the head surgeon, as clearly demonstrated by the first episode. You just cannot assume, based on her appearance, that she's not experienced enough when her skill set clearly demonstrates that she is. That's a discriminatory attitude.