And people like me, at the ripe old age of 9, didn't know what they were, so they put them in the pocket of their shorts and carried them around to show to their friends thus damaging the product. Unfortunately my 1st tans all got washed in said pocket of my shorts and completely destroyed. By the time the later series came around, we knew what they were, and if we weren't into sticking them on things, we didn't put them in our pockets and took better care of our collection.
In all actuality though, most of the higher grade cards came from product opened after 9-pocket sheets and hard plastic protectors were commonplace. There were far less series 1 unopened packs killed later in life, thus the shortage of higher grade material.