Now, the card is back on the public market for the first time
This is mostly to avoid the look of impropriety, as being able to see the back of the card means theres the possibility of marking (i.e., putting marks on certain cards so you can tell when they pop up in your deck without drawing/scrying them)
Sure, you would have been an absolutely annoying mono-white staple, but you would have been a staple
EARLIEST SETS, SUCH AS BASE, JUNGLE
However, by standardizing certain data points about a card we could go down the path of statistically indicating the probability of a Magic card being good and thus being a good candidate to increase in price
Creatures are also much easier to recur and reuse, which is obviously of great interest for any graveyard deck