So are the overall objectives of the web site. And so is your audience. These comprise the rules of the web design dance. Content needs to be on time, on topic, and appropriate to the audience. Know when to call the bouncer over.
Some experts are straightforward and respectful.
Others are passive aggressive and challenging. And some are just plain aggressive. They're always breaking the rules, but just barely, just enough to make your work life miserable. Their content requires a lot of fixing and your dignity suffers as you work hard to make this jackass look good. That's when it's time to call it quits and kick him out.