I think part of it is that in a real card game, the exact words and grammar used are everything. The people playing the game have to read the card independently and come to the exact same conclusion on all details or else you have a problem.
Yu-Gi-Oh! struggled alot with that part and so the company had to publish different errata of cards.
Consistency is key for expansion(s). The amount of unexpected mistakes and combos will rise when these minor mistakes add up.