Totally. And it's more than just a style. It's about intellectual curiosity and an openness to being shown a better way. MMA's like that, too.
And for what it's worth, I'm pretty sure if Khabib paid his $40 for an IBJJF membership, they'd let him enter any competition he wants. And if he wins gold at the Mundials or the Pan Ams black belt division, I don't think anyone would suggest he didn't use BJJ.
Point is, he may not want to, but that's him... not the art (and by extension, the underlying openness and curiosity) of BJJ.
Now, to be clear, if he's a jerk, he may not find too many schools to train in... but that's different.