What does the author mean by "Room to think?" In your opinion, why is "Room to think" important or not?

Reference: Kirk, Andy. Data Visualisation: A Handbook for Data Driven Design (p. 50). SAGE Publications

The "Room to think" defined by the author can mean the proposal that each individual must obtain knowledge on a certain subject through research and self-study, inspiring the reading of the book.

Therefore, it is considered that the space to think is important, as it motivates the individual improvement to obtain more learning and knowledge on a subject, according to their own analyzes and studies.