I see where you're coming from. The problem is that German death camps are by far the most talked about type of concentration camp. Canadians and Americans had concentration camps for the Japanese, for example, where the conditions were significantly better. Even most of the German concentration camps were relatively humane.

One pattern I've seen, is that some people use "concentration camps" to refer to bad ones, and "internment camps" to refer to okay ones, and maybe that's a an okay distinction, but the reality is often a lot less black and white than our words would like to suggest.