I strongly agree with your main assertion. I heard several professional journalists recommend "networking" and "effective self-promotion and marketing" to get internships with well-known companies to add to your as the main advice for new journalists, versus focusing their advice on how to do quality reporting to produce good work samples.

However, I speculate that The Wall Street Journal and The Washington Post are equivalently great places for advancement for reporters (if only because the NYTimes's new executive editor/editor-in-chief spent much of his career with the WSJ).