As a freelancer I have to get to know the business my customers are in, I can’t just focus on purely technical things most of the time. Many times I have described my work to other programmers and heard how they want to be left alone to code. I take over legacy software and failed projects for a living. The two main reasons in my experience for software dev project failure are (a) developers did not bother to gather and understand requirements but rushed to start coding, and (b) poor communication with the customer and stakeholders. Those faults may come from arrogance or inexperience, or both.