The interviewer was David Letterman. The audience was people who like watching David Letterman.
Rand Paul was distilling part of the message suitable for the audience at hand. You don’t give infants filet mignon, you give them easily digested pureed applesauce.
If you saw the interview, David Letterman demonstrated either that he is a simpleton, or he thinks he audience is composed mainly of simpletons.
Yeah, that must be it. LOL!