This feature, i.e. shafts and passages that are blocked at the design/build stage of the work, prevails throughout the pyramid. The idea that this has something to do with human access/or prevention of it/ cannot be applied to the ‘star shaft’ doors, which are accessible only to rats and robots. For this reason it is not unreasonable to suggest that all the blocked shafts and passages were considered as a single theme in the eyes of the designer’s. The only obvious access point is therefore the single hinged door at the entrance to the descending passage. Here, it seems, the designers were able to produce an opening and closing door (which could be sealed if required), yet this facility is found nowhere else in the structure.
Given the consistency throughout the building of shafts and passages where access is blocked, including places inaccessible to people, it seems less likely that access for people in the upper design was a principle concern, or considered significant. To put it another way the motivation for blocking the star shafts cannot be isolated from the motivation for blocking the larger passages, the coincidence of ‘blocked shafts’ in so many cases is too great. The remoteness of the star shaft doors therefore suggests, imo, that preventing human access was not the reason for creating any of these blockages.