Yes, considering that grappling is Tom's base, why not? This is not the same thing as judging grappling ability from Pereira's early MMA fights and using it to analyze current fights, Tom had already been training for many many years since a young age, as his father was an MMA fighter.
He is simply much more talented with MMA boxing than he is grappling, what's so crazy about that. It's enough to make me think that the grappling MMA GOAT will be able to exploit his weakness, even if he's past prime. It's not like every fighter becomes leaps and bounds better at every aspect of MMA just because time goes by. Jake Shields never turned into a great striker, Heath Herring never developed TDD, Justin Gaethje never turned into a BJJ wiz etc. Fighters are more naturally talented at certain aspects.