As a member of a high profile organization, McHale's obligation is to be at least somewhat forthcoming to a press whose duty it is to inform the public/fans. Communication is the main feature of a coach on the court as well as on behalf of the Rockets front office, and he should conceal his annoyance and arrogance toward other professionals who are simply trying to do their jobs. They don't require great quotes. He's blessed with a wonderful sense of humor so I don't understand (or appreciate) his sarcasm and putdowns.
most of the post-practice interviews happens up against the wall. Go look up the ones from Harden, Parsons, or Lin.