If a person is interviewing for a supervisory or HR position, there's a lot more involved than just their personal behavior, and even with personal behavior, just saying "I treat everyone equally" in a blandly shallow manner suggests a lack of experience with or thought about clashes of perspective in an organization.

Or, to use an analogy, consider interviewing someone who, when asked about their preferences and strategies for ensuring code quality, answers "I just write correct code in the first place". Even if they're correct in that statement, that's not the sort of person you want in charge of that subject, because most people don't work like that, even if they wish they could.