I tend to agree with you, to be honest. Seems fairly clear that Carreyrou was going to conclude that Back is Satoshi, come hell or high water.
Kind of a disappointing piece of work from the guy who took down Theranos. His journalistic talents are sorely needed elsewhere right now.
it seems he pursued Theranos when it was hot, but he had not much to do with the background work
https://news.ycombinator.com/item?id=47698933