While I do agree that many developers sometimes like to argue about "code quality" too much (and I've probably been guilty of that at times), "code quality" is definitely a real thing. I have have interacted with code bases that were a joy to read/modify, and I've interacted with code bases that made you pull your hair out at every turn (and also many levels in-between the extremes). It is not always a case of just "arguing for the sake of arguing".