What he means is that almost every resident evil fan wants that prototype, because its a whole new game.

Currently a guy on PS museum holds the prototype, least last I checked. 

Since he holds a good amount of respect with the corporate side of games, he won't dump the iso. Hence 5000+ pages of death threats and the guy decided to remove the page and disregard anything he might have said about said ownership of the prototype.

Its said because if those discs deteriorate, we'll lose an important piece of capcom's history.