"There is no way to tell somebody they are wrong and have to change in a "nice" way. Your organization either can focus on the quality of the end product and encourage criticism or focus on appearance and censor it."

I agree with some of your post, but this part here is a false dichotomy. All over the world people doing complex work are able to disagree constructively without being raving douchebags about it.

There is a ton of collateral damage that comes from employing some sanctimonious jerk who cannot be bothered to consider the humanity of his/her colleagues. Most companies I've worked for get that.