Grand Theft Auto IV's "Biggest Flaw" Is Actually A Strength

There is one particular alleged flaw with the writing of Grand Theft Auto IV that I've seen many times for many years. In fact, given that this game has a very heavy story component, one might even say that it's the primary aspect of the game, a major issue with the story could easily be considered the biggest issue with the game. So the following discussion isn't about the objectively worst part of the game because that will change from person to person, however it's something that could be considered the worst thing depending on your perspective. So enough stalling, what is this issue I'm referring to. Well, it has to do with the tone of the game.