I have been described as a contrarian, but the people who use it do not see it as being as the OP describes.
My definition of it is one of those given in a dictionary opposing or rejecting popular opinion or current practice. Nothing said about 'it is cut across, diminished, problem solved, conversation ended'. Surely that is something else entirely. Bullying, treating someone with contempt, arrogance, but not contrarianism
In any discussion I almost always end up looking at the topic from the other side, I do it on GN, but I do not want to diminish the other persons view, nor give the definitive solution to the problem and certainly not end the conversation.
On the contrary, having people putting different views, or putting a different view when every one else is in agreement, both leading to discussion and exchange of views is the very essence of aa good discussion.
Aggrieved Contrarian.