She didn't compare herself to just the people who were killed in Benghazi. She was talking about the hardships that are endured by all diplomats who are stationed in dangerous or difficult countries. Here is what she said, from the OP's link...........
We are people who repeatedly uproot our lives, who risk and sometimes give our lives for this country. We are the 52 Americans, who, 40 years ago this month, began 444 days of deprivation, torture, and captivity in Tehran. We are the dozens of Americans stationed at our embassies in Cuba, and consulates in China whom mysteriously and dangerously, and perhaps in some cases, perhaps even permanently, were injured and attacked from unknown sources several years ago.
And we are Ambassador Chris Stevens, Shawn Patrick Smith, Ty Woods, and Glen Doherty, people rightly called heroes for their ultimate sacrifice to this nation’s foreign policy interests in Libya eight years ago.
She was talking about the difficulty of being a diplomat in a lot of different places, not just Benghazi.
And yeah, there are lots of hardships and difficulties in being a diplomat.