Haha! Actually was providing specifics to counter this generalization:
I never saw a changer in a radio station, but sound quality, snack breaks or bathroom breaks wasn't the reason. Album sides and even full albums would get played periodically, but the standard practice everywhere I worked was to mix song to song across the two turntables, and the goal was to blend the set as seamlessly as possible. A changer is about as far removed from this as you could get.
My tables have always been single play, but flipping records manually is part of the fun. I think the old mechanical changers are amazingly intricate machines, they're just not for me. And I don't think changers as a general rule destroy records. Remember, also, that the sound comes from within the grooves, not the surface. I've got some records with visible marks across tracks that play silently.
Reply if you like, but I suspect you and I are more in agreement than opposition on this.