> No developer was ever unhappy to communicate

I've worked with engineers all over the spectrum in terms of their styles, beliefs, and preferences... and some of them are frankly not very interested in getting out of their comfort zone (like heads down, writing code and being alone), and optimizing for the group rather than themselves.

So yes, they are in fact unhappy to communicate (in a general sense), because of how tedious and uncomfortable communication often is.

I'm not saying it's irrational or immoral, or not driven by the types of past poor experiences you mention, but in my experience it's often pretty obviously suboptimal and highly frustrating to work with.