I agree with what you are saying but that is just another way of looking at the same thing.
I would refer you to the path examples: https://wiki.openstreetmap.org/wiki/Path_examples
in particular
"A path with no signs at all but too narrow for motorcars so it's not a highway=track but starts from the end of a track. Allowed and not totally unsuitable for cycling, but known to be walkable.", and
"A path through an urban forest as in "there is something used for transport"; walking is possible on dry and non-winter days with a sure foot, but you wouldn't route anyone there."
I don't see you adding any scrubs to mark an impassable terrain but you simply removed the path, instead. 
There is a lot of dead-end paths on Hochschwab exactly for the reason you mention, although it is perfectly walkable. Do these dead ends mark that you can't go further? Or do they mean it's open to go wherever you want? It's a huge difference.