The problem is every time we compare guns with smoking with cars, etc. is that they're extremely different objects. To your smoking comparison, people smoke for their own enjoyment, not with the intent to cause harm. While that can be said of most firearm owners, you have people who intend to use them to cause harm. So what's the appropriate comparison on the side of smoking? Second hand smoke, while harmful isn't intentionally done to harm others. That's why there's plenty of laws about smoking indoors, 20 ft away from a building, etc. The equivalent of someone going on a shooting spree would be someone to capture second hand smoke in a large gas tank and then lock a bunch of people up in that room and pipe all that second hand smoke in. It's the intention to cause harm that really makes the difference.
And for the most part I think people recognize and accept that guns, while they have their uses, are inherently dangerous objects such that they are subject to extra screening, precautions, and regulations. I'm not necessarily saying we need more, but there are pretty logical reasons why mass shootings get a lot more attention than car accidents.