That is the worst. The "That's not my job" attitude is from people who are not team players and believe that they are above doing certain work, regardless if the work needs to be done. If you work in a problem solving profession, then you just can't have this attitude, because eventually someone is going to ask you to solve a problem outside your domain, and if you can't figure it out, then it doesn't get done or they get someone who will figure it out.

Although people bringing their stapler to the IT help desk is one of those times I might not be mad if the response was "That's not my job"

Which is a cop out anyway. Programmers don't get paid to "write code," they get paid to solve problems. Part of that is discussing options and strategies with teammates and making sure everyone is on the same page (or as close to the same page as possible when you have teammates with vastly disparate specialties and expertise).