If your textual copy past includes some requirements of conforming to a contract, or simply actual copy past of "knowledge" (which can very well also be a under

If your textual copy past includes some requirements of conforming to a contract, or simply actual copy past of "knowledge" (which can very well also be a under the form of a big textual pattern), the mere form of "primitive copy-paste code that never calls functions and intoduces unique variables for each section" does not actually reduces coupling (except MAYBE if it is expanded down to the metal, including expansion of syscall and/or low level libraries, but you won't do that). Also what have globals anything to do with that, and why do you put them in the supposedly factorized code. You are mistaking it with a bad mess you once saw, maybe? On the other hand, code bases obtained through copy paste based programming can not be considered anything else than a bad mess. But yes, factorizing can be done badly, even to the point of being counterproductive. Like anything.