Seth's a pretty far-end WWE fanboy anyways. Those people have blinders on to the world outside of WWE. It probably doesn't compute to him why everyone wouldn't want to be in WWE.
Also the WWE itself as an entity and Vince in particular aren't known for looking at their flaws and figuring out how to correct them, they engage more in finding excuses and reasons outside of their control to explain things away. That likely filters down to their top guys too, and a fanboy like Seth is more likely to accept it because he already believes in them anyways.