To which the inevitable reply is: If I put my gun in a safe place, it won't be where I need it when I need it. A similar argument is frequently used as an objection to manual trigger locks, which have also been around for a very long time.
An effective smart gun eliminates that objection by allowing a firearm to be stored somewhere accessible while still preventing accidental discharge.
I understand there are enormous technical challenges to achieve that goal, and I'm not claiming the current generation of technology is effective, or heck, even that an effective solution is possible.
But I think it's absolutely disingenuous to claim that all firearm discharges are done under deliberate, life-threatening circumstances, or that this kind of technology does not have the potential to save lives while still providing an effective tool for self-defense.