Help is confusing, this module CAN hide content

In the help this part is confusing:

"It is important to understand that this module grants privileges, as opposed to revoking privileges. So, use Drupal's built-in permissions to hide content from certain roles, then use this module to show the content." There are no such built-in permissions, except for View published content, but that would override anything else anyway, including this module.

"This module cannot hide content that the user is allowed to see based on their existing privileges." This is not correct. This module does hide content that the user would be allowed to see otherwise.