I have a Powered Airlock door with no Access Permissions. No dupe has custom access. Nonetheless, my duplicants will path through the door in order to perform errands (despite their being a longer route available that doesn't include the door).
I believe this is because the Dupilcant doesn't technically "use" the door in this case, translating directly from the top ladder tile to the enclosed room. (I was able to avoid the "Nature Reserve" buff from an active Nature Reserve by passing through a corner of it in a similar way)
Steps to Reproduce
Load the attached savefile. Wait for Camille to path "through" the door.
This issue has not been confirmed by a developer yet.