Why is it that so many developers are immediately defensive when they are told that they should try to change the way they operate. When a construction worker is given a better hammer or a automatic nail gun they are quick to realize the benefits via immediate feedback and are able to assimilate the new tools into there jobs, assuming they are not state workers, they do not complain that they could nail plywood 5x faster or that they are less strained at the end of the day. However when I tell a developer that there are changes to their current practices that they can take to improve I am immediately met with a defensive posture. I do not enjoy placating developers and the hours listening and nodding my head agreeing that they are smart and their knowledge and experience is are useful. These experiences are useful, I will assume that your developers do not suck, and it is hard for a person to listen to you shatter their school of thought whether you have a logical explaination or not and not feel personally attacked.