None of the other trades seem to worry about building codes, why should we?*
The framing inspectors, for instance, don't exactly go around and check to make sure 16D common nails were used to frame a house as code requires, or if as many are installed as required by code. Thus, the framers blisfully use 16D sinkers or coolers or whatever fits in their nailgun, oblivious that despide being a 16D nail, their substitute has different structural properties and their house is now full of structural defects and liable to collapse if it gets anywhere close to design load. And how many of us have seen plumbers go through and notch the hell out of structural studs and plates? Or done it yourselves?
* That was rhetorical, btw. And sarcastic
I may be a sick person for reading IRC through cover-to-cover and actually enjoying it, lol