> perhaps Amazon shouldn't require them in their recruitment and performance review processes

They are selecting for people who will "play the game" or, even better, will believe proactively.

No one with a lick of sense would believe that Amazon strive to be the best employer in the world. But someone who is capable of doing, for e.g., a highly skilled coding job and who believes that Amazon actually strives to be the best employer, is a rare beast who will likely not unionize at the drop of a hat.