Why? Because companies such as Japan's TEPCO filter which members of the press are allowed access to information and they filter the information itself. In the US, companies such as GE, owning media outlets such as NBC, are also in the nuclear technology services business. Bad press about nuclear is simply bad for business.
President Obama has been pushing nuclear as well, along with renewables, while good old fossil fuels still reign. Why? Profits to US companies. But do we want these kinds of profits? Germany doesn't and will be off nuclear within a decade, replacing much of its energy needs with renewables such as solar power from the Sahara Desert.
Why does Fukushima still matter? Because no matter what TEPCO or the authorities have claimed, the reactors and the fuel pools are unstable. Jokingly, just as things have literally been heating up again, the thermometers have broken and thus no readings can be made.
If one more sizable earthquake strikes near Fukushima Daiichi and disturbs what is left of the structures, especially the extremely precarious Reactor 4, and if the spent fuel pools holding thousands of rods catches fire, the release of deadly radioactivity into the air means cancers, death and contamination over an enormous area, not only in Japan but on the West Coast of the US, or virtually wherever the wind is blowing, as well as in the Pacific Ocean, where radioactivity has already been measured in kelp, fish and the water itself.