>>708no because each pressurized part is much more resource expensive: you need tough walls to maintain pressure, heat air, install airlocks and all the stuff.
Apparently ISS has unpressurized cargo and laboratory holds and cranes for accessing this stuff without leaving station.
>>706if mass was the biggest constraint then why not? Remember that solar radiation quickly decays many materials so probably they have limited options.
On the other hand if this video was faked then I see no reason to install flappy doors there as well - if nasa was faking video they would put much attention to such details.