Structure

Adding new pages to a space that is publicly accessible, but the information on the page is confidential may someday reveal information unintentionally. While this is less a problem on official pages where access privileges are of major concern, spaces dedicated to team communication typically do not have the time to rate the privacy status for each piece of information.

Therefore the level of privacy should be defined for each space. The number of spaces is much smaller than the number of pages. Teams typically handle a small number of categories of spaces. So it is much easier to remember the privacy level and add the information to the right spaces.

Advantages

Makes it easier - especially for team communication - to handle the level of privacy appropriately.

Disadvantages

The simplification is not applicable for every use case. Especially where the number of spaces is limited, users need to handle access restrictions based on page trees.