30,000 dead may be statistically small compared to the vast human and gun populations, but what other problem creates that many deaths where we don't do anything about it? People die from the flu and we bend over backward with vaccines and Tamiflu to try to eradicate it, short of making the vaccine mandatory. We tackled Polio, buildings are safer, cars are safer, roads are safer, everything that needs to be safer is safer or it is eliminated. We go to great lengths to overcome all those public safety/health issues. Except for guns. Guns are more popular and more available and more lethal. It makes it seem like we're dumber than a box of nails on this one.
one, because purchasing a firearm does not inherently pose a widespread public health risk as opposed to say....not vaccinating against measles or polio.
two, because car crash fatalities can be partially addressed as a structural issue, as opposed to a usage issue (which manufacturers have improved via ESC/ESP, also mandated as of 2010). guns aren't blowing up in people's faces (which would be a structural problem). they're being used by people who come into their possession, legally or illegally.
18,000 of those 30,000 deaths are suicides. that suggests a two-pronged approach - keeping firearms away from people who at risk of suicide, and removing the stigma associated with mental health treatment so people can get the help they need. the former is hard, and involves stripping people of a right. stripping people of rights should be done with extreme caution, if that approach is to be taken. the latter is also very difficult, because it requires a cultural shift on our views of mental health treatment.
a guy i know of at my old job took a shotgun to his own mouth. a smart gun would not have stopped that, and i don't know if anyone knew that he was at that point of depression. it's a tragedy regardless of your opinion on guns.
the vast remainder of that 12,000/30,000 are from handguns (about 8,000 IIRC). most of the handguns used in these deaths are illegally acquired. which means that if it's from a straw purchase, a smart gun also does no good. if it's from theft, a smart gun may or may not do any good, depending on whether the theft involves the "smart" part of the system (i.e. wristband).
three, smart guns would require virtually perfect reliability. you can almost bet that the second there's a fail to fire due to failure of the "smart" mechanism, and someone is injured or dies, there will be a giant ass lawsuit and lawyers will be handsomely paid.
four, guns are accessible because they are mechanically simple. mandating smart guns would increase the price, and could in theory push what has been established as an individual right out of reach for many americans. which then could provoke the argument of "do only the 'rich' deserve protection and practice of their rights?".
personally, as far as preventing accidental deaths, i believe education is paramount. educating firearms owners, educating children. and not educating them to fear, but to understand - understand the responsibility that comes with firearms ownership, understand the gravity and consequences of using a firearm, understanding to respect a firearm for its capability for both good and evil.
and just a note that there are fewer accidental firearm deaths for children than there are accidental pool drownings.
as far as fighting gun crime, we've actually been doing very well on that, at least from a numbers standpoint. i think if the war on drugs were changed, you'd find a lot less violence due drug-related activities. also, if the prison system were reformed in such a way that criminals came out rehabilitated instead of better criminals, that would also help. again, not an easy task.
short answer is that there is no easy solution. "assault weapons" bans and the like are certainly not the answer though, i can tell you that much. they are knee-jerk reactions to tragic events that only punish law-abiding citizens.
more meaningful reductions are going to come from changing our attitude on mental health, drugs, and the purpose of the prison system. unfortunately, none of these are easy tasks.