I think there is a HUGE middle view.
Its your position that causes 90% of the problems. Consider: a case I heard related to me by a restoration builder.
Old 17th century housem used by various institurtions who covered up many features as part of adapting it for office use. Then it gets listed. Years later private owner is trying to restore it, and comes across a stud wall built in the 60's slap across a gothic door and frame. Wants to remove said wall to expose said gothic frame. No way Jose.
Aniother case entirely in point in these parrts. Rotten oak beams. Restore wants to haul most of them out and replace with similar. No. If more than 6" is sound, that must be presebred and new wood cut in round it.
Is the house a museum piece? No. Its listed more because the TYPE of house it is and the methods of construction are of interest.
But the listing process ensures that it will never be anything other than another piece of heritage that falls down because no one can afford to fix it to the required standards.
There is a wonderful old house no more than 400 yards from me..its in worse shape than mine was when I pulled it down - unlisted thank god - and needs careful restoration. but the consortium that was going to buy it pulled out. Too expensive to fix. The land with the building on is worthless as it can't be redeveloped. What is going to happen? The owner will keep it with the derelict house on till the bloody thing falls down.
Is it worth a listing? yes, probably. Its one of the few timber framed originally thatched cottages left in these parts. However, one would never be able to restore it to that, because when it was listed it had a shingle roof and corrugated iron roof.
Actually teh issue was cast alumnium. A material which te victorains would have creamed their trourses to use had it been available.
Apalling details can always be removed.
Structures that fall down due to being beyond economic repair are lost forever.