And yet, he said, "it may hold out longer than business or law, but culture can change too."
Rivers, for her part, is similarly optimistic.
"It's going to happen. It will happen. Cream rises to the top," she said. "I know it sounds stupid, I've never seen someone who has the talent who did not eventually get what they deserve in a good way. It may be a little harder, but ... I think (the networks are) desperate now. The only negative thing is that they're so desperate they're not giving people a chance to grow. Fallon was given a chance to grow, and I wonder, if he had been a woman, if they would have allowed that. I just have a feeling they wouldn't have been quite as generous in the time allotted to him to totally come into his own."
But again, it goes back to her point of finding someone fortified to withstand such a test.
"It's a very special art, a very special talent, and you have to be very strong," Rivers said. "You have to be a great talker, a great listener and you have to be a fan. And they just haven't found the woman with all that yet. But she's out there."