> The biggest problems I've had in projects has always been of techical nature

In my 15 years in web software development, my experience has been exactly the opposite. In fact, all the technical problems came from people problems.

"Empathy" may be too narrow or too loaded a word, but I agree with the idea here.

> people failing to understand problems of techical nature

You may be illustrating the problem yourself here, if you'll allow me to be a bit presumptuous.

It is the technologist's job to prevent failures of understanding. Believing that everyone else thinks/feels exactly the way you do is often how misunderstandings happen.