I agree that seems a little backward, since it's not nearly as interesting to imagine the "life" of a pristine coin, but it is what it is.
These things don't have intrinsic value. They're worth what collectors think they're worth. I'd be happy if I'm interested in collecting something that is unpopular/inexpensive. Now, if anyone really cares, like if someone has their own hoard of defaced genuine coins, they can try to hype them up in normal ways, write editorials in trade mags, talk at coin shows, or, most likely get numismatics influencers to hype them up, etc.