No. But they are expecting this to be an extreme diff
Like, it's VERY characteristic of BB to get beat up heavily yet still persevere (see when Luffy hurts him or Ace or Whitebeard), but this shit is almost ominous.
The scene where he starts to use his darkness powers does not look good for Law. Even then, sure, I expect Law to do a decent job putting up a fight, but then there's even the potential of him revealing his 3rd power if he has it already, or the nature of his body.
Something is going there, and it's not like Oda is going to show all of BBs powers and toys before fighting Luffy. It's frankly odd that people don't see the inevitability of this fight outcome. He just got Pudding, and he needs RPs. It's 100% going to end in his favor.