So, you're saying McCoy is toxic in KC? It was a mistake, plain and simple.
Back to the topic at hand. Williams can contribute in ways that our other receivers cannot.
What contributions were made by DiMarco to the offensive effort on Sunday?
What contributions were made by Smith to the offensive effort on Sunday?
Pick one of those two unnecessary pieces and sit them; activate Williams. Does it make a difference? Nobody knows, that chance is gone. Could it have made a difference? Potentially, yes.
If you cannot agree with this then we don't really have anything to discuss.