I think it's a case where modern journalists (and in many other parts of society) find a hypothesis they think will do well and hunt for leads/studies/data that fit the hypothesis. It's easier to do because you only need to do as much research as to prove the outcome demands, and does better with the readers because they're interested in the result less with how they got there. It's like going out as a hunter knowing your only goal is to hunt a buck. You know what you're hunting, so you can prep accordingly with the deer call horns and other paraphernalia.
Good journalism - something I believe was done more by the journalists of the past - go out to interesting places and talk to interesting people to gather whatever they can, and find a good story within that. In terms of the hunter analogy, it's more like laying a whole bunch of traps, be it fish, bird, beaver or bear, and seeing what you end up with at the end of the day. You might not always get what your readers want, but it's also more fulfilling and often important when you land a prize catch.