“You know, anybody who says words hurt has never been punched in the face.” That is how Chris Rock opens his live Netflix special “Selective Outrage.” Strategically, he waits until the end of his set to land his knockout blows, the reasons the service gambled people would watch. But it took a while to get to it. Segueing from a bit where he praises Beyoncé’s beauty while making it clear he wasn’t disrespecting Jay-Z – “I do not need another rapper mad at me. . . . I do not need the smoke!” – he opens his examination of last year’s Oscars slap by pointing out the size difference between him and Will Smith. “First of all, I know you can’t tell on camera, but Will Smith is significantly bigger than me. We are not the same size, OK? We are not – this guy does movies with his shirt off! You’ve never seen me do a movie with my shirt off. If I’m in a movie getting open heart surgery, I got on a sweater,” Rock …