why are people that surprised? sure, it's sparring but look at the difference between John Wayne Parr and Rogan's movements and positions in relation to the opponent. John Wayne Parr is always in the right place at the right time, his hands are always at the right place at the right time and his head is also.
Rogan on the other hand is fighting like anyone on the street would. he's walking directly into Parr, zero cutting angles, zero feints, zero head movement, even his punches are ugly. he whiffs the left hook to the body and overall his sense of distance and timing is all off.
Joe Rogan can kick hard, and pretty fast, but that doesn't mean he's an expert on landing those kicks on a human being.