Unless you live in an area that never has earthquakes, floods, fires, unemployment, recession, cyclones, blizzards, ice storms, transportation breakdown, strife, war or natural disasters, then preparedness is a good idea.
It is a good idea for the Watchtower to bathe their members in this new light that has been available in the front pages of telephone books for the last 30 years and on countless public service announcements for decades. There is no downside to publishing that, and a great upside when someone needs those supplies during a disaster, and then they can be a poster child at conventions and in Watchtower articles about how Jehovah's organization provided that life saving information in a timely manner.