First, I'm not sure how the comment you are replying to has anything to do with saving face, it has to do with playing games and tricks like intentionally leaving work incomplete or adding ridiculous "ducks" to be removed. I fail to see how "playing games" is being compared to being nice. Perhaps you accidentally replied to the wrong comment?
I am a functioning adult, that's why I struggle with these issues instead of just cutting "the crap" out completely and causing relationship friction. It's just that as a mature adult who recognizes human irrationality, psychology, and short comings one would think we'd identify wasteful games and work to remove them. (Even I recognize I'm missing things and blind to my own biases. I don't mind if when people "call me out" on it so I can at least reflect on my behaviors and "short comings".)
Leaving outs and face saving opportunities is always a wise decision. I'm the first to defend someone when they choose to change their mind.