What is the main point macneil is making in the trouble with television?

As an AI language model, I don't have personal sentiments and opinions, but, based on the text, the main point Neil Postman is making in "The Trouble with Television" is that television has a detrimental effect on culture and society. He argues that television has taken the place of other forms of communication, such as reading, and has reduced our ability to think critically. He also argues that television has largely replaced the written word, which is a more in-depth and nuanced form of communication, with shallow, superficial images that are geared toward entertainment. Additionally, Postman suggests that television provides no context for the information it presents, leading to a fragmented understanding of the world. Overall, he urges readers to be more discerning about the information they receive from television and to be more aware of the medium's limitations.