There's a strong medical education research unit in the UK (Edinburgh?); I remember one of their reports on a series of med student interviews making the observation that it was unnerving how the top performing medical students weren't the most compassionate, they were the most ruthless.
I'm taking my boards soon and I have to say, the ability to commit to the task, regardless of the emotions of your self, patients, peers, support staff, and family can definitely be an asset at times. Do I hope to take a kinder view when I start working in a few months? I'm not sure kinder would be the word. Supportive of a somewhat different set of ambitions, perhaps.
Unfortunately, that ability to deny the emotions of both self and other in pursuit of good clinical care is difficult to separate from 1) the punishment of self-loathing, and 2) the behavior of someone who has been rewarded too long for blind obedience.