News sources are heavily subjected to bias. If you read the transcript, you are free to make your own interpretations. But if you read the news coverage, you must listen to their interpretations. There are times when you mught want to do this, such as if you want to gauge political opinion/stance and see people's reactions, but if you want to form your own, you should read the source. It's kind of like reading a review of a movie. It gives a good and accurate summary, and takes way less time than watching the film, but you're missing out on a huge part of the experience if you only read the review