It isn’t really much of a discussion if low effort contrarianness doesn’t have a chance to surface thoughtful disagreements which otherwise get buried in more combative threads. The comment itself might not have taken much effort, but it can easily spawn a more interesting discussion by being so bare of nuance.
Good! Now the less quick trick is finding a way to affect discussion not just prompt it. It’s very similar but requires a lot more anticipation of other people’s emotional state.