HR people have to do something. If all they want to do is ask inane questions then there's no harm in that.
It's interesting because when you have too many people on board a project, some folk inevitably like to stick their oar in and 'do' something even though it would be better if they actually sat back and did nothing. I'm thinking of some projects where, for example, there have been too many business analysts or project managers who have only managed to cock things up and have been no help whatsoever.
Developers usually have no problem doing nothing, and testers never really do much anyway. It's the busy body manager-types who cause all the problems.