I'm not a freelancer (anymore), but this applies to agencies as well. Unfortunately it's not my call at this point, but there have been several instances where

I'm not a freelancer (anymore), but this applies to agencies as well. Unfortunately it's not my call at this point, but there have been several instances where we should have put our foot down and told the client that we're the experts and we're giving them something that will produce results. This can be hard though for some people to grasp. In several industries the customer is always right, but in ones like this, the professionals are generally always right.