This gets into a "What is you concept of waymarking?" philosophy discussion. I believe that waymarks should not be archived (doesn't matter to me whether this is a deletion or an actual archive) just because the item waymarked has been removed/destroyed/ or no longer meets the criteria. The suggestion has been made to the web site designers to add a "status" type display that clearly marks a waymark as no longer present at the location.
I think your category would be much better served by celebrating those waymarks of animals that recovered enough to be removed from the Red List instead of designating them as "not interesting enough for my category."
As I said, it rather boils down to your philosophy of how you think waymarking should work. I disagree with you in this area. That's why I voted no and will continue to do so as long as you plan to archive waymarks.