Billions of dollars are spent on advertising in this country. Advertising companies hire the very brightest, wittiest young people to write for them. Not one single sentence of it is worth repeating. Why? Because it wasn't meant. It was all written, not because the writer felt something and then said it (if you feel a thing the more simply you say it the better, the more effectively), but because he tried to impress and inveigle people, convince them something is very fine about which he himself does not really care a button.
-- Brenda Ueland, If You Want to Write 115-16 (2d ed. 1987).
This is one of the problems that I had with being a litigation attorney. But now that I read this I see that it's also a problem with my other dream career, writing advertisements and labels for toothpaste and shampoo bottles.