I don't buy that.

A suit asking you questions and a dude calling you names in the locker room are 2 different things. The suit, he's a prospective employer and you are going to BS him whether he asks you if you are a peanut popper or if you smoke crack. The dude in the locker room you punch in the mouth, even if the question doesn't bother you, just to show you are alpha.

I am pretty sure the great majority of players interviewed during the combine (if any at all) have never been in that setting, i.e., being interviewed to that degree by a suit in an office, but all of them have been in locker rooms, played in front of large crowds, been called names by opposing fans, etc...