Most likely connections (and talent). They have also almost certainly done some journalism work, even if only freelance and student newspaper, so they have a resume to point to. The more common historical route was to work through a bunch of small market papers as the parent suggests.
>recipe for a very slow to grow or advance career
Not sure why--at least more than journalism generally. If I had a choice, I'd get on board the Wall Street Journal or the New York Times early on rather than spend a decade "paying my dues" covering high school sports and whatever else mostly passes for news in a 10,000 person town.
What an asinine remark.
Do you want the work? Do you want to be in the industry at all? Then you take the jobs that are on offer.
Who wouldn't skip to the top if they could? In all other cases, you take the long road, the hard way, the slog, and tough it out because you're made of thick skin, stern stuff, and strong character. You don't bail because it's hard.
Leaving aside the question of whether, say, Google is actually a great place to work or not, I'd say more or less the same thing to a would-be software developer who didn't want a job in the field unless they could get a top-paying position at Google HQ.
Also makes me wonder about my local news celebrities. But then my most easily brought to mind is a weather forecaster in a beautiful climate...