The government bans books in Fahrenheit 451 because it wants to control what people think and do. Books are seen as a threat to the government’s control over the population, and they are seen as a source of knowledge and information that can be used to challenge the government’s authority.
The government also views books as a source of entertainment and distraction from its propaganda, which is why it fears that books can be used to promote sedition and rebellion against the state. Books are also seen as a threat to the government’s monopoly on information and knowledge, because they can be used to spread dangerous and subversive ideas.
Finally, the government bans books in order to prevent people from challenging the status quo. It fears that books can be used to spread dangerous ideas that could upset its power structure, so it tries to prevent this from happening by banning them altogether.