As others also point out it would be stupid to not recruit a guy with Pryor's talent's. To quote TP, "Everyone does" or was recruiting him. Coaches who recruit get a pretty good idea of a player's personality and maturity level. I think his point was that you not make it a habit to go after guys like him, but when you do as soon as the player steps out of line you put him in the dog house - no matter how good he is.
I think as an OSU alum, Herbie is the kind of guy you want as an ambassador - intelligent, well-spoken, and sincere. He just didn't want OSU to become a place like Miami in the 80's. Sure they won and Ray Lewis and company were great athletes. But it's a mixed bag and guys like that bring a negative perception to the university as well.