According to Mark Rosewater, this was done so that the product could be advertised as having "over 300 cards"
Arcane Archer of the Forest [1st Edition] AST-029 (YuGiOh Ancient Sanctuary | YuGiOh Cards) prices are based on the historic sales
By banishing it from the Graveyard, you can send any Dark Machine Monster from the deck to the Graveyard, so long as you can target a face-up Monster on the field as it will give it a temporary Attack boost (but you generally use its effect for the Foolish Burial-like effect)
In fact, Tetsuko Umezawa helped me secure the top prize of $2,000 in the first Arena Open
While this means that your favorite cards might not be legal in the Standard format anymore, it does keep the meta fresh
Some combination of the stuff that was banned and caused the RC to resign (Dockside, Jeweled Lotus, Mana Crypt) and low-hanging fruit (biorhythm and Coalition Victory are the current front-runners) is likely on the agenda