The dumbest part is not that he doubted Clark or Lockett; it's that he presumed to know what the other 31 draft boards looked like. Clark had 1st round talent and had fallen down draft boards for dropped charges and an irrational fear of SJW blowback. It seems reasonable to think that at least a few teams had Clark on their board, and a talent like his wouldn't likely last much later than it did already.
It was the same story almost to a T with Bruce Irvin. People like Mel Kiper thought Irvin was a 3rd rounder, but it turned out that something like 7 NFL teams had a 1st round grade on Irvin. Nobody in the media can say for sure if a player was a reach or not, they can only give an opinion on the player's talent being worth the pick. And in the case of Clark, it was obvious even at the time that his talent more than justified the pick.