These incident role names are fairly common in product companies these days. I guess you are correct that they do suggest a certain culture around incidents, but in my experience is definitely a good thing. It's a "don't blame people, let's focus on the root cause, get things back up, and figure out how to prevent this next time" sort of thing. People try to meet SLAs and they treat each other like humans. We focus on improving process/frameworks over blaming individual people. And yup, think this comes along with, "incident yesterday was intense, I'm gonna catch up on sleep".