The unreasonable voice is not a voice you hear a user experience person use. The rare couple of times in (12 years) that I have head it from a UX person, it turned out it was their grasp of UX that was the problem. They were not actually a UX person at all.
It is not in our nature. All our training and knowledge is about the reasonable voice. User experience is about being a people person. We talk to people and seek to understand them; behaviours, motivations, goals, needs, wants etc. in order to come up with UX strategies.
User experience requires us to be good listeners, ask questions, be fair, compromise, suggest, hypothesize, share information, evaluate, analyse and think in order to put the user first.
In dealing with co-workers and other colleagues this usually holds true also. It is probably why the UX community is vibrant and full of events, conferences and meet-ups.
The unreasonable voice demands, judges, talks over people, interrupts, dictates and has to have the last word. Nobody wants to be around some one who uses the unreasonable voice.
User experience people who use the unreasonable voice are not really user experience people.
Thanks for reading please share or leave a comment!