Because Embiid actually is funny, and comes off as genuine. Dwight comes off as a painfully unfunny guy who's trying too hard. He's the Michael Scott of the NBA. Joel's likable; Dwight wants to be liked. Also, Embiid's already a much more skilled basketball player. Unlike Dwight, he's actually fun to watch.
[Pompey] Embiid to Undergo More Tests - "Embiid might have suffered a fracture to the orbital bone of his left eye, sources said Thursday, adding his eye was kind of caved in."