I don't understand the desire for news-outlets to have lots of op-eds in the first place, just as much as I don't understand the need for news programs to "ask the people on the street".
Now, obviously, analysis is a different beast. Having experts on politics analyse political stories or scientists analyse science stories can add context to complex stories. I would understand that an outlet like the NYT would want analysts from all sides provide their insights and, for instance, hire both a conservative and a liberal economist to analyse stories on the economy. But for a serious news outlet to hire people to write opinion pieces about whatever tickles their fancy is just weird.