If HR isn't asking candidates about themselves as a person, or is only asking generic "Tell me about yourself" kinds of questions, then **they are doing it wrong. **
On the other side if a candidate doesn't have any questions about their future work environment, not just the role they applied for, then they too are doing it wrong. A candidate should care about whether they would fit into an environment / culture.
At its core employment is a relationship and both sides should treat it that way.