He is too. Billboard is the authority figure when it comes to numbers. They confirmed last month DAMN was the 2nd biggest rap album of the 21st century from an objective angle in terms of charts dominance, sales, commercial impact,...I’m talking factual numbers as far as the number of people who consumed and became new fans of 50 in a one year period.
Do what you want with this objective metric, feel free to subjectively enjoy another album if you want, but it is what it is. It was bigger, period. Your personal and subjective observations really doesn't matter against the company that does the official tracking of sales, streams, charts, hits, radio,,...