They can be but the point here is that they don't get a benefit from any more calls than any other team. You're just seeing it more than the calls that benefit the Browns or the Titans. Because those teams aren't winning SB's every year.
This isn't about the Chiefs. This is about fools like you gobbling up any excuse you can find that your team isn't winning. Take out the Chiefs and insert Buffalo or SF or Eagles and I would make the same argument. The "league" isn't rigging anything. The "league" is the 32 owners. The refs work for them. I the other 31 owners would be on board with rigging games for KC. Also, if the NFL was going to fix games why in the fuck would they do it for such a small market team, and let huge market teams like the Giants, Jets, and Dallas not be a contender for decades? There are really only 5 true "dynasties" in NFL history.
NE
Pittsburgh
SF
Packers
KC
4 of the 5 were small market teams during their dynastic run. Everyone except NE.