Exactly! Thank you! Almost every single one of these doctors has had inappropriate non-professional interaction with a patient at some point. They have all let their personal stuff interfere with their work. That's just how the show works. ... granted, it has been done more subtle ways in the past.
I remember, early in season two there was a pretty similar episode with the whole abusive-dad-organ-transplant storyline. Back then it was the abusive dad who needed a transplant and his kid was the only available donor. It was not so subtly written to reveal more of Alex's background. Cristina had been the one who thought it was wrong let the kid donate and she straight out said that to the mother.
Quite honestly, where is the fun in watching a show where everybody acts ethnical perfect 100% of the time?