Because the truth is, nobody cares about saving lives. The well being of the populace matters not in any political agenda, whether it be Republicans or Democrats. The only thing that is of concern is CONTROL. Guns are the only thing standing in the way of totalitarian rule here - not necessarily by a single dictator, but by a ruling class of people. You know, the 1% (or maybe the 0.10%).
It's not like we get in the way (much) of them doing or taking whatever the hell they want anyway, but apparently controlling and owning everything at a 90% level (number pulled out of the air) just isn't enough to satiate their madness for absolute, complete control of everything.
HEY! Where'd this foil hat come from and how long has it been on my head?!