Played extensively within Commander, Pioneer, Modern, and even Vintage, Karn, the Great Creator has myriad uses
Fans who set themselves the goal of collecting one of every card in Scarlet & Violet151 cant ignore the Reverse Holo printings, so even Common cards like Pidgeotto end up being expensive if they have that foil sheen
A grading decision was made by PSA that no card with a visible crease (as opposed to a soft corner) could obtain a grade higher than Very Good - Excellent (PSA 4)
Now, my answer to this personally is that rarity is another form of proper design of magic cards
GAMENOOK More Double Promotions, This Time Inside A Trainer's Magazine - Dark Ivysaur & Dark Venusaur In Japan in 2001, there was a magazine called Trainer's Magazine, focused on providing TCG players and collectors with tips, tricks and guides