Lets not act like there aren't strikers who are just as one dimensional, with major wrestling/grappling deficiency. We just saw Jones "win" a "title" (no he didn't, Gane was never champ), by submitting a kickboxer who looks like he's never rolled a day in his life.Then we have 185 where Izzy and Alex's grappling credentials combined are a blue belt and junior high school sprawling.
Many high level fighters in the UFC are one dimensional, but because every fight starts standing they don't get exposed like this as often. Do you know how many fights Alex Pereira, Izzy or Cyril Gane would've won if they had to start every fight on all fours in a wrestling position or in a double leglock BJJ position? very few, they'd be pointed and laughed at and none of them would've sniffed a title fight.