Another thing to consider is do you think Oakland is smart? If you say they are, how do you justify giving up this great pitcher for a rental when they had a 10% chance of winning the west? So a smart team on a tight budget traded a star for a chance to be in a 1-game playoff.
That's why back when we first discussed the trade I qualified it with "unless the As pulled the wool over the Marlins' eyes".
It is certainly possible they know something about Luzardo that the Marlins don't, which made them willing to deal him. Of course, even smart teams make mistakes...they just make fewer mistakes than the dumb teams.