As people professionals we are often involved in decisions and policy development that will be something that union reps (and therefore the union members) are consulted on. I feel this could be a conflict of interest or at least raise an ethical concern of knowing more about how organisational decisions or changes are being developed, whilst also knowing how people within the union are feeling or what they want to see changes on.
Notwithstanding confidential matters which should remain confidential, I foresee situations where it would be difficult to know how much to say or how much to allow wider your knowledge to impact conversations that you're part of, whether that's within the union or within organisational management discussions.
Obviously, everyone should feel able to join if they want to, but what's the reality for people professionals?