✔ 最佳答案
I will usually play devil's advocate if I see someone being blindly optimistic, even if I actually happen to agree with the point of view.
I don't consider it a NEED to be negative but, a need to be objective.
Blind optimism is just as bad as blind pessimism, and I'll argue a point either way if I feel the proposed idea isn't thouroughly represented in both the pro and the con.