People have given examples in this thread almost right away. Do you think Potan is legitimate black belt? Did you see how it was earned? Have you seen him roll?
Zero chance. There's over a dozen examples like that, Brazilian strikers are notorious for it. Here's Islams own examples since you won't respect mine.
It's been a tactic for a long ass time. The amount of black belts that Jon has submitted as a white belt is hilarious.
Islam Makhachev has named several UFC fighters that he thinks don't deserve their black belts
bloodyelbow.com