From an email from Evan Mathis to Sports Illustrated. Quote below and then link to article.
"To the purists who think a card should always be in its original condition: That just isn’t going to happen in the current state of the industry, and you should avoid buying graded cards.”
https://www.si.com/mlb/2021/07/06/to...ow-daily-cover
If Evan's right, the TPGs may not even be trying except in blatant cases.