The back mentions it. I don’t think it should affect the grade personally, but I am also of the opinion that the grade overall doesn’t really mean much.
CGC graded the set all together. While being able to see the lot of cards side by side, they graded on an adjusted scale that took damage that was common amongst the cards into account. Think of how Rocket or Jungle with a rough cut is graded to allow the paint chip affect on the edge of the card.
Just sharing facts and keeping opinions out. Don’t come after me