By your definition anyone but the Glazers would be puppets, without authority either. But executives don't just freestyle and then see what sticks when the board get involved. They negotiate internally what their strategy and (financial) parameters going forward are and then, afterwards, act them out in public. Whatever Zorc does has been authorized by Watzke and/or the board. He knows the answer on whether they can afford not to sell Sancho before he enters the public arena, not after.
The function of the board is oversight, not active management, it's staffed with CEOs from outside companies and politicans, not football people.