Not to justify author's UX choices, but he does mention that the feed shows reports from the trails the user follows. It's not a list of random trail reports, there is some logic behind it.
I don't disagree, just noticed that many comments missed this detail about the feed showing reports for user's favorite trails, not some random irrelevant content.
He mentions it, but fails to make the UI show that. It just says "Trail Reports", and he says it's the main screen. And there's a search box at the top. Does that only search trails I've followed?