It’s a convenient location to the studio and, given that it’s a draw for tourists from the sticks and also for weirdos, the field producer is guaranteed to come back with at least three stupid and ignorant answers for the segment. Universal City Walk is a favourite spot for the same reason.
Once in a while, they’ll also throw in a smart or educated person who reacts in an entertaining way, but they can’t count on most people being witty when put on the spot like that.