Agree totally. Especially on a new ball that has not yet had the time to do whatever it may do eventually... Turn yellow, develop spots, etc.
The grading is an indicator on how the ball looked the day it was graded, which could change radically over time even with the best possible storage.
How many ugly stained balls will we eventually see with 9 or 10 grades? Once they "turn" those balls will never get cracked out. They'll pass from owner to owner like hot potatoes for years.