I think that goes way too far. There are parts in a watch that are supposed to be replaced every so often, like mainsprings, crowns and seals. This is true even if the watch is NOS and was never touched by human hands since new.
So long as the correct part is used, I'm OK using the term "original". However, a disclaimer should be used regarding a unknown service history of a watch. For watches where the original parts have been discontinued and factory replacements have been installed, this should be mentioned as well. Very few sellers possess this kind of knowledge, so it's really not fair to expect it.
You can't legislate perfection.
gatorcpa