Actually, things like this really are big deals for many reasons.
1.) Opportunity to learn more about the creation and destruction of stars, solar systems, galaxies, etc.
2.) If the burst of energy is heading straight towards Earth and has the power to wipe out life on this planet, then it just now reached us, giving us little time in comparison to the cosmos on to either save ourselves or prepare ourselves for the end. (not saying the radiation from this supernova is currently a threat to us)
As f*cked up as it may seem, the troubles and quarrels mankind have is really, really on no comparable level to any such event space has to hold. We're mere ants, no, mere nanobes (one of the smallest organisms known to man) compared to just our galaxy alone. A war in the middle east will mean nothing if we ever find out Earth itself is in terrible danger from a cosmic event. And trust me, our planet, Earth, has it's fate already set by a cosmic event. If it survives long enough to see our own sun consume it, it still died due to a cosmic event.