Simple Fan
First or Last
The difference is that sprint car races and big money late model races are not opening acts for the cup races. They aren't on the same tracks as the cup series. They aren't even close to similar. When Kyle Busch or Kyle Larson race in podunkville, USA, they aren't racing in cup equipment and support.
Cup drivers have no say in where an Xfinity or Truck race is going to run and if its accompanying a Cup race then and they have a chance to race, why not? I'm not one to agree with putting a limit on when drivers can drive but they did it and I think they got it wrong. It'd be better if they just made 10 specific races rather than 10 when ever for a Cup driver if they want to limit drivers in lower series.