Any business has it's cliche's soooo trite that seasoned veterans just roll their eyes at the mention.
I can only imagine that dairy farmers get tired of hearing how "udderly" wonderful their business is.
Or the teacher who hears from nearly every parent that their child is "so gifted".
Well, in voiceovers, the general impression is that you get paid for talking.
In the most rudimentary analysis that's true…just like Jeff Gordon gets paid for driving, or Lance Armstrong gets paid for bicycling.
Here's an article that explains it diplomatically: "GIVING VOICE TO A CAREER"