Why It’s Tough to Be an Interviewer

I’m reading I Am Not Spock by Leonard Nimoy. From it:

While being interviewed by Dick Cavett, Katherine Hepburn said: “You come into town with your box of goodies and that box of goodies is you, and you start to use it and sell it and eventually the box of goodies gets used up and then you must go back to something else to fill up the box with some new goodies.”

Imagine listening to her deliver that whole sentence in her quacking Katherine Hepburn voice. How could anyone do it and not tell her to shut up?