This is the key observation of Imre Kertész's book Sorstalanság about his surviving Auschwitz and Buchenwald as a deported Hungarian Jew. He is frustrated by people asking him postwar about how terrible the camps were. His thinking sort of goes like this: the human spirit is strong and can survive anything an oppressor throws at it, but to ask about the horrors of the death camps is to suggest that they were capable of breaking one’s spirit.

In the end (I don’t know if this counts as a spoiler or not) Kertész even admits to feeling nostalgia for some of the moments in the camps.