It's fair to assume that a legal journalist will have a basic understanding of the law or the case at issue, but don't forget that the readers or viewers are the ones who really need to understand your quotes. If the case is big, you already may be adept at handling the press. But it doesn't hurt to anticipate questions and even start framing some responses before reporters call. And if the case is keeping you too busy to deal with the media, assign someone else to talk to the press. For one thing, I may know that already.
Editors can assign the lousiest articles.
For another thing, it comes off like sour grapes. The best thing you can do is answer my question to the best of your ability, no matter how ridiculous you find it. You don't have to research your answers and you don't have to sound like Perry Mason. You may not love dealing with the press, but as long as the First Amendment exists, news reporters will cover trials and analyze important decisions. Either talk to me or risk reading that you were unavailable for comment.