First, I'll point out that you are the one bringing guns into this. Your standard response to an event like this is to make an ad absurdum argument calling for the banning of trucks, or knives or whatever.  

I would point out that automobiles are quite highly regulated and are far safer as a result of those regulations. Ownership of cars,licensing, drivers license - all are regulated. Automobile deaths have been long seen as a problem. hence seatbelts, guard rails, speed limits and a host of other intrusions into you right of free movement are in place to make us safer.

Finally, my pickup hauls things around. That is why it was invented. Guns kill things. That is why they were invented. Screwdrivers were invented to secure fasteners. All can kill. Of these three, which one is being used for it's intended purpose?