I think we have two different opinions on what cooking a secondary means. I agree the WR corps was awful for the chiefs, you're right about that
Dawg if the kitchen cook gets out there and gets 15 yards of separation to catch a TD on a 5 yard route in the super bowl, he cooked your ass.
When I say cooked, I'm talking about the route, not the stat line. Look at how bad the Eagles defended both of those plays. Probably had three times as many yards in separation as the stat line for the yardage on each throw man.