You'll have to explain how WotC avoiding the inclusion of content that resembles racist thinking in their published materials makes it more complicated for you to run your game and why anyone should be concerned about that.
I'm guessing that the idea is that "all orcs are evil" is less complicated plot wise and game management wise than "hmm... each of these groups and individuals have their own motivation that needs to be considered when I run a game."
A reason someone might be concerned is over in the thread about whether there is a DM shortage - and if part of that is due to the complexity of running a game.
(To me, the extra complexity to address this is well worth it).