The basis of the argument is that Kor tells tall tales, but he isn't the only one who references eating the heart of the Albino in "Blood Oath." So, it makes no sense to continue that argument if another Klingon, other than Kor, references eating the heart of their enemies.I dunno?
The more interestng side is that the Klingons who reference it, Kor and Kang, are from the same era as DSC, meaning that it might have been a cultural shift over the next 100 years.