It's worse than that, only the purest of the pure can be employed. Look at Apple's recent mob firing of Antonio García Martínez. Who made the mistake of writing a best selling and critically acclaimed book just 5 years ago. Featured as one of NPR's best books of the year, recommended by NYT, Washington Post, etc. But now it's suddenly a fireable offense.
“An irresistible and indispensable 360-degree guide to the new technology establishment.... A must-read.” New York Times
“Incisive.... The most fun business book I have read this year.... Clearly there will be people who hate this book — which is probably one of the things that makes it such a great read.” New York Times
“Reckless and rollicking... perceptive and funny and brave.... The resulting view of the Valley’s craziness, self-importance and greed isn’t pretty. But it’s one that most of us have never seen before and aren’t likely to forget.” Washington Post