The WWE is very family friendly, so that argument isn't relevent if you've watched wrestling for the last 5 years or so.
Cena's old gimmick certainly wasn't very family friendly though..
That was when wrestling was good though...
But yeah, that was a jab moreso than anything. I doubt they actually believe that, just some guy taking the piss out of the sport.
John Cena isn't even skilled in his profession, let alone other ones.