Take Kyodai, Soul of Kamigawa, for example
Once the card stock is made, it has to be printed, coated, and cut
Unfortunately, as this particular Ink colour combination has been very successful competitively in the last two sets, players may found some of the more powerful cards from the previous sets to be quite expensive
Many players enjoyed how the set truly captured the feel of the Phyrexians from the gameplay to the mechanical themes to the art to the overall look and feel of the cards. And here is one of the lessons learned from that same set: The Phyrexian flavor was off-putting
Notably, the same doesn't hold true for good cards: if players take the card they scry, but the next card is even better, they still get to draw that better card next turn (barring something like a fetchland activation)