Comment by solid_fuel

Programmers should ensure they understand the requirements of what they are being asked to build, and not just blindly build things. If I was asked to build an accounting system, I would insist on speaking with an accountant to understand the requirements. If I was asked to work on a medical imagining system, I would want to be working with a qualified radiologist and probably a PhD holder in a relevant field too.

Overconfidence can quite literally be fatal.