Quoted from BlueMeanie

There's clearly a case to be had for not having done the 'Get Back' project. It was way too soon after The White Album, and they had few songs ready. A recipe for disaster after the trauma of the previous album, and with the cameras rolling as well. Good management may have been able to steer them away from it, at least for a couple of months. But then, Abbey Road would have been a very different record, and maybe they wouldn't have ended up finishing on the high note that they did.