True, but Macha bristled under the Beane leadership too, Beane wants the manager to execute his vision to the absolute micro level. Most organizations have the macro determined with the micro being more flexible. Beane wants and has more input to the lineups and such. In the mid 50's Hank Greenberg was teh GM of the Indians and he chased Al Lopez to the White Sox by demanding pretty much what Beane does today.
Differnce being Hank Greenburg may have been the worst GM of all time while Beane is one of the best. From looking at the history books and such -it appears Greenburg shot himself through the foot many times.