Adding a Blank Page should be easier.
As such a simple, mundane, yet often important thing to accomplish, one would expect it to be a simple right-click away on the Thumbnails Navigation Pane.
However, it is found in Organize Pages. Organizing does not suggest creating or adding.
Adding a page is a form of Editing and the ability to Add a Blank Page is not found in Edit PDF.
Adding a Page should be simpler and not limited to one "tool".