Not every single article needs to be Woodward and Bernstein dude. Sometimes you just need to report what happened, what someone said. If that ends being an incomplete or incongruous picture, you gotta chalk it up sometimes to the nature of such matters in the world, not a deficiency of the journalism. Your argument could be applied to literally any piece of journalism! In general, answers to possible questions are not finite, metaphysical things that we can always fully account for, and its not a news articles job (which isn't even a long form investigation style piece!) to try.

I know, of course, you are not arguing uncharitably here, so I can only assume this is the first news article you have ever read.