Construction workers don’t get PhDs and a decade of experience before they can build a safe structure.
It’s trivial because you can look up virtually any plans or tutorials and see the accepted ways of doing things. You can type it into Google and get instant results explaining why something is against code.
This person had to go out of their way to spend extra money to do it differently. It’s not even a good example of a pitfall, because everything in framing construction revolves around nails by default.